Diamond of improved rectangular diamond cut

FIELD: jewelry.

SUBSTANCE: diamond of rectangular cut has beveled facets. Each of said beveled facets adjacent to four apexes of crown has fracture extending along diagonal line parallel to belt so as to form facet configuration wherein beveled facet is divided into lower beveled facet and upper beveled facet. Upper angle of upper beveled facet crown may be made smaller than angle of lower beveled facet crown and, accordingly, even without altering of crown height, so that sign of facet is slightly smaller. Deviation angles of star facets and of second beveled facets from horizontal plane, provided that both are capable of intensive reflection, may be made small, and areas of these facets may be made large. Thus, all reflection patterns become similar in size to the extent that is preferable for visual perception. By making star facets and second beveled facets so that they have small angle of deviation from horizontal plane, extremely intensive reflection may obtained and increased areas of star facet and second beveled facets may be provided. This allows cut to be provided, which is characterized by extremely intensive reflection (the number of visually perceptible beam reflections).

EFFECT: improved rectangular diamond cut by providing optimal shape of facet configuration for increasing the number of visually perceptible reflected beams.

10 cl, 19 dwg

 

1. The technical field to which the invention relates.

The invention relates to a rectangular brilliant-cut diamond, which gives new configuration of the facets. Rectangular diamond cut is sometimes called a " cut "Princess".

2. Prior art

The size of the decorative faceted diamond depends on the size of the raw stone. In particular, the height of the crown, the depth of the pavilion and the size of the belt is determined by the size of the raw stone.

Even if the size of the diamond is kept the same, the brilliance of a diamond varies when it is cut. The authors of this invention for diamond round brilliant cut introduced the concept of "visually perceptible reflection rays" and invented the design cut, which can increase the number of visually perceptible reflection rays for evaluation of gloss, which can be perceived by the observer in the study of diamond; was made an application for the grant of a patent (application for issuance of Japan patent No. 2002-253011, filed August 30, 2002, and a similar application for the grant of foreign patents, for example, in the United States, USSN 10/350388, filed January 23, 2003).

In the previous application for the grant of a patent for diamond round brilliant cut number of physically reflected rays received thereby, wherein the cells was determined by delani is m radius of the diamond into 100 equal sections, and the density of rays received in relation to each cell. As the radius of the diamond is several millimeters, the size of the cell is several hundred square micrometers. The amount of light was calculated only for patterns of 30 cells or more, whereas the area perceived by human eyes. The number of visually perceptible reflection rays is defined as the square root of values equal to one-tenth the number of physically reflected rays for all patterns, and received the sum of visually perceived reflected rays of all patterns. That is, the number of visually perceived reflected rays was calculated according to the following equation:

the number of visually perceived reflected rays=Σ{(the number of physically reflected rays for patterns of 30 cells or more in each section)/10}1/2where Σ means the sum of patterns in the same area.

When the observer examines a diamond from a point above the plate of the diamond, the light rays falling behind the observer, overlap the observer and, therefore, do not reach the diamond. On the contrary, the light rays with large angles of incidence does not actually contribute to the reflection. Accordingly, assuming that the light rays with angles of 20-45 degrees relative to the normal to the facet of the diamond plate (namely, the Central line, connecting the center of the facet plates and Caleta) are effective light rays, reflection intensity obtained from the incident light beams of the above-described range, called the "number of effective visually perceptible reflection rays", and the design cut, contributing to the increase in the number of effective visually perceive the reflected beams was also studied in the above application for the grant of a patent.

In the study reflected rays from the diamond described above, the number of effective visually perceptible reflection rays is effective in the case when uniform light rays fall from almost all of the surrounding parts; on the other hand, when the light emission comes from the flat ceiling, it is necessary that the light intensity was expressed in cos2θwhere θ means the angle of incidence.

When rectangular brilliant-cut to form a rectangular columnar belt between the rectangular upper cross-section and parallel rectangular bottom cross-section, a crown above the belt and a pavilion below the belt. Because rectangular brilliant cut with square flanges are often used, below is the description, which assumes that provides a square cross-section.

As for Asano on Fig, which depicts a top view, on Fig, which shows a side view, and Fig, which depicts a bottom view, a conventional rectangular brilliant cut 400 has a crown in the shape of a square truncated pyramid 420 over a rectangular columnar-belt 410, having a square cross-section, and the pavilion 440 in the form of a square pyramid below the belt 410. In these figures the corresponding axes x, y and z shown on the basis of a coordinate system with origin in the center of the horizontal cross-section BB bb', formed by four vertices at the bottom of the belt 410. Central line connecting the center of the facet plates and Caleta R, adopted per Z-axis, and the horizontal cross-section BB bb' is taken as the xy plane. Crown 420 in the form of a square truncated pyramid has on its surface facet 421 plates, four beveled facet 423, four facet 427 belt crowns, four second beveled facet 429 and eight facets 431 stars. Facet 421 plate is located on a plane parallel to the xy plane. Facet 421 plate is the upper plane of the crown 420 having the shape of a truncated pyramid, in which the first four vertices of F, F' have, respectively, near the upper vertices B, B' square belt 410, and each of the four second peaks Del feature in a point that is offset in an outward direction from the midpoint of the line segment, connect the existing two adjacent first peaks F, F' of the first four peaks, along the line connecting the center of the plate and the midpoint; thus, the facet 421 tablets is an octagon formed by connecting each of the four second peaks respectively Del with a nearby pair of the first four peaks of F, F', respectively located exactly opposite the four vertices of the belt B, B'. Beveled facet 423 is a quadrilateral BCFD in which a pair of diagonal vertices is a pair of vertex B and vertex F or a pair of peaks B' and the vertices of F', where peaks B and B' are the top vertices of the belt 410 and the nodes F and F' are located exactly opposite vertices B and B'. Every facet 427 belt crowns is a trapezoid BB CC', which is formed by the party (for example, BB') of the upper cross section of the belt 410 and the sides BC and B C', closest to the above-described rib belt CENTURIES', between the two sides beveled facets 423, each of which has as its vertices either of the two ends B and B' side BB'. The second beveled facet 429 is a triangle CC Del, who formed a party SS', one of the parties facet 427 belt crown, parallel to and opposite edges of the belt BB', and the second vertex Del, one of the vertices of the facet 421 plates opposite the middle point of the side BB' facet 427 belt. Facet 431 star is a triangle CFDel, the cat is who concluded between a party FDel facet 421 plates, side CF beveled facet 423 and party CDel second beveled facet 429.

Pavilion 440 in the form of a square pyramid has on its outer surface four main facet 441 pavilion, four facet 443 belt pavilion and many facets 447, 449 and 451, which divided the area between the main facet 441 pavilion and facet 443 band pavilion. Each of the main facets 441 pavilion is a quadrilateral bLRL', in which the vertex b in the lower part of the belt and the lower tip (Caleta) R pavilion 440 in the form of a square pyramid are a pair of diagonal vertices. A straight line passing through the bottom of the tip R of the pavilion 440 in the form of a square pyramid and the center of the facet plates, will be called the "Central line" (z-axis)and the plane including the Central line and divides the square edge of the belt at the midpoint, will be called "plane dividing by the zx plane or yz). Every facet 441 pavilion has vertices L and L', located opposite each other on the planes, dividing the center, and a pair of nearby pavilion facets has a common side LR, connecting the top of the L in the plane, which divides the center, located between a pair of facets, and the lower tip of R. Every facet 443 belt pavilion is a triangle BB's, educated side bb' of the lower cross section of the belt and the point S, the location is Noah on the plane, sharing center, which crosses the direction bb'. The main facet 441 pavilion (bLRL') and the facet 443 belt pavilion (BB's) have a common vertex of the belt. There are two separate lines bM and bN between bL side, passing through the top b of the lower cross section of the belt, one of the sides of the main facet 441 pavilion and party bS facet 443 belt pavilion, passing through the same node b of the belt with the ends on the plane that divides the center, also passing through the top of L; thus, thanks to these two separate lines formed by the three triangles 447, 449, 451 between the two facets 441 and 443, with three triangles have a common vertex shared by these two facets 441, 443.

As for the rectangular brilliant cut, a study of the cut, allowing to increase the number of visually perceptible reflection rays. Thus, it was found that the rectangular brilliant-cut once you have set the height of the crown, the depth of the pavilion and the size of the band, recorded the size of the facet plates and facets stars, so it is impossible to increase the number of visually perceive the reflected beams by selecting the optimum angle of the crown. Change the height of the crown may cause changes in the dimensions of the facet plates and facets stars, but you can change the heights of the crowns depend on the size of the raw stone. Currently discovered the following fact: reducing the size of the facet plates and increasing the size of the facets stars with the aim of increasing the number of visually perceived reflected rays inevitably leads to an increase in the height of the facet plates; thus, the angle formed by the second beveled facet and the facet plates or horizontal cross-section (xy plane)formed by the upper or lower four vertices of the belt becomes larger than the angle of the crown formed by the facet of the band of the crown on the side from the top of the cross-section of the belt, and the facet plates or horizontal cross-section (xy plane)formed by the upper or lower four tops belt so that the cut is actually impossible.

The invention

Thus, the object of the invention is the provision of a rectangular brilliant cut diamond, enhanced to provide the configuration of facets, allowing them to have the best form to increase the number of visually perceptible reflection rays.

In addition, another object of the invention is the provision of design, cut, based on the above-described configuration of the facets and the optimal in order to increase the number of visually perceptible reflection rays.

According from what retenu diamond improved rectangular brilliant cut contains the rectangular columnar belt, a crown having an octagonal facet plates on the top of the crown and formed above the belt, and a pavilion below the belt. Rectangular columnar belt has an upper rectangular cross-section parallel to the facet plates on the border between the belt and crown. The crown has four trapezoidal facet of the band of the crown or upper facet of the band, the four lower triangular beveled facet, four upper triangular beveled facet, four second triangular beveled facet and eight triangular facets stars on the outer surface surrounding the crown. Facet plate has the first four peaks and four second vertex, each of the first four peaks located near each of the four vertices of the upper cross section of the belt, and each of the four second vertex is located at a point displaced in the direction of the line (called hereinafter "Central line"), vertical with respect to the facet plates, from the center point between two adjacent first peaks. Four facet of the band crowns and four lower beveled facet located on the same line, alternating with each other, forming a row along and above the border. Each of the four facets of the band of the crown has a base coinciding with the side of the upper cross section of the belt, and each of the lower beveled who's facet has a top, the two sides passing through the top and the base opposite the vertex, and the vertex coincides with the vertex of each of the upper cross section of the belt that is common to both facets of wreath crowns on both sides of each lower beveled facet, each of the two sides coincides with the side of each of the two facets of the band of the crown, and the base has two ends, each of which coincides with a vertex that belongs to each of the two facets of the band of the crown. The top four beveled facet, four second beveled facet and eight facets stars are in one line, forming another row between the facet plates and next, with the facets of wreath crowns and lower beveled facets. Each of the upper beveled facets has a vertex coinciding with one of the first vertices of the facet plates, and the base coinciding with the base of the lower beveled facets. Each of the lower beveled facets forms an angle with the facet plates, greater than the angle between each upper beveled facet and the facet labels.

The pavilion consists of four main rectangular facet of the pavilion and many triangular facets of the band pavilion or lower facets of the belt on the outer surface surrounding the pavilion. Each of the main facets of the pavilion has two opposite vertices, one of which is the bottom tip of the diamond, the location is authorized on the Central line, and the other coincides with each of the lower peaks of the belt, and two sides, each of which coincides with the side belonging to the neighboring main pavilion facet on the plane (hereinafter called "the plane that cuts through the center"), passing through a Central line and through the center, located between two adjacent bottom vertices of the belt.

In diamond the improved rectangular brilliant-cut diamond according to the invention pavilion may contain four triangular facet of the band pavilion. Each of the facets of the band pavilion has a base that coincides with the connecting line between two adjacent bottom vertices of the belt, and a top opposite the base plane, which divides the centre, crossing the base. One of the main pavilion facets and the facet of the band pavilion, nearby in relation to the main pavilion facet, have a common vertex coincides with one of the lower peaks of the belt, the main facet of the pavilion has a side passing through a common vertex and end on the same plane, which divides the center, and the facet of the band pavilion, nearby in relation to the main pavilion facet has a side passing through a common point and the other end on the same plane, which divides the center. Between the side of the main pavilion facet and the side facet of the band pavilion, blizlezasih is in relation to the main pavilion facet, the pavilion has at least two triangular facet, with a common vertex, separated by at least one of the delimiting line through a common vertex and through the other end on the same plane, which divides the center. Between the side of the main pavilion facet and the side facet of the band pavilion pavilion can have from one to four separate lines, through which there is a division into two to five triangular facet.

In diamond the improved rectangular brilliant-cut diamond according to the invention pavilion may contain eight triangular facets of the band pavilion. Each of the facets of the band pavilion has a vertex at the intersection between the lateral facet of the belt and the plane that cuts through the center, crossing the lateral facet of the band, another peak, coinciding with the lower apex of the lateral facet of the band, and a separate peak on the plane that divides the center. Each of the facets of the band of the pavilion has a direction in the plane that divides the center, shared with the adjacent facet of the band pavilion, which has a peak coinciding with another lower top of the lateral facet of the band. Two adjacent facet of the band pavilion have such an angle between them that General direction on the plane that divides the centre, forms a ridge between them. One of the main pavilion facets and the facet of the belt is and pavilion nearby in relation to the main pavilion facet, have a common vertex coincides with one of the lower peaks of the belt. The main facet of the pavilion has a side passing through a common vertex and end on the same plane, dividing the middle, and a facet of the band pavilion, nearby in relation to the main pavilion facet has a side passing through a common point and the other end on the same plane, which divides the center. Between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main facet of the pavilion, the pavilion has at least two triangular facet, with a common vertex and separated by at least one neighboring separated by a line passing through a common point and the other end on the same plane, which divides the center. Between the side of the main pavilion facet and the side facet of the band pavilion pavilion can have from one to four separate lines, through which there is a division into two to five triangular facet.

In diamond the improved rectangular brilliant-cut diamond according to the invention it is preferable that the pavilion had one of the delimiting line passing through the common vertex of the belt and the other end on the same plane, which divides the center to have two triangular facet, having shared in Rhino and separated adjacent delimiting line between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main pavilion facet.

In diamond the improved rectangular brilliant-cut diamond according to the invention it is preferable that the angle between the lower beveled facet and the facet plates were 23-26 degrees to the angle between the upper beveled facet and the facet plates was less than the angle between the lower beveled facet and the facet plates, and was 13-25 degrees, and that the main facet of the pavilion was at an angle 38-42 degrees with respect to the facet labels.

In diamond the improved rectangular brilliant-cut diamond according to the invention, it is assumed that the Central line passes through the origin of coordinates x, y (0,0) and that one of the lower peaks of the belt is located at the point with coordinates x, y (2,2), it is preferable that the first vertex of the facet labels nearby the top to the bottom of the band, had the x, y coordinates(0,7-1,2; 0,7-1,2), what three lines that are closest to the Central line, which include the side of the main pavilion facet, side facet of the band pavilion and delineating the line between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main pavilion facet, crossed the plane that cuts through the center points located closer to the origin than the x-coordinate of the first vertex of the facet plates, and to the second ver the ina facet plates had the x coordinate, equal to 1.3 to 1.6.

List of figures

Figure 1 is a top view of the diamond of the improved rectangular brilliant-cut diamond of example 1 according to the invention;

figure 2 is a side view of the diamond of the improved rectangular brilliant-cut diamond of example 1 according to the invention;

figure 3 is a bottom view of the diamond of the improved rectangular brilliant-cut diamond of example 1 according to the invention;

4 is a chart illustrating the patterns of reflection in the first quadrant of the diamond improved rectangular brilliant-cut diamond of example 1 according to the invention;

5 is a graph showing the dependence of the average number of visually perceived reflected rays from the corner of the pavilion of the diamond improved rectangular brilliant-cut diamond of example 1 according to the invention;

6 is a graph showing the dependence of the average number of visually perceived reflected rays from the corner of the crown diamond of the improved rectangular brilliant-cut diamond of example 1 according to the invention;

Fig.7 is a graph showing the dependence of the average number of visually perceived reflected rays from the corner of the upper crown diamond improved rectangular brilliant-cut diamond of example 1 according to the invention;

Fig is a top view of the diamond of the improved rectangular brilliant-cut diamond of example 2 according to the invention

Fig.9 is a side view of the diamond of the improved rectangular brilliant-cut diamond of example 2 according to the invention;

figure 10 is a bottom view of the diamond of the improved rectangular brilliant-cut diamond of example 2 according to the invention;

11 is a diagram illustrating patterns of reflection in the first quadrant of the diamond improved rectangular brilliant-cut diamond of example 2 according to the invention;

Fig is a top view of an improved diamond rectangular brilliant-cut diamond of example 3 according to the invention;

Fig - side view of the improved diamond rectangular brilliant-cut diamond of example 3 according to the invention;

Fig - bottom view superior diamond rectangular brilliant-cut diamond of example 3 according to the invention;

Fig - chart illustrating the patterns of reflection in the first quadrant of the diamond improved rectangular brilliant-cut diamond of example 3 according to the invention;

Fig is a top view of a conventional rectangular brilliant cut;

Fig - side view of the conventional rectangular brilliant cut;

Fig is a bottom view of a conventional rectangular brilliant cut;

Fig - chart illustrating the patterns of reflection in the first quadrant under normal rectangular brilliant-cut.

A detailed description of the preferred embodiments

Figure 1-3 shows the improved rectangular b is iliatova cut of example 1 according to the invention. Figure 1 shows a top view, figure 2, a side view and figure 3 is a bottom view of the considered cut. On these figures the corresponding axes x, y and z shown as coordinates having its origin in the center of the horizontal cross-section formed by four lower vertices of the belt. Central line connecting the center of the facet plates and Caleta R, adopted per z-axis, and the horizontal cross-section formed by four lower vertices of the band, taken as the xy plane. Even the improved rectangular brilliant cut 100 includes a rectangular columnar belt 110 located between the rectangular upper cross-section and parallel rectangular bottom cross-section, a crown in the shape of a rectangular truncated pyramid 120 above the belt 110 and the pavilion 140 below the belt 110. In the following description, for convenience of description, description will be made on the basis of the assumption that each of the upper and lower cross-section of a rectangular band is a rectangle, preferably a square.

Crown in the shape of a truncated square pyramid 120 has on its surface facet 121 plates, four facet 127 belt crowns, four lower beveled facet 124, the top four beveled facet 127, four second beveled facet 129 and eight facets 131 stars. Facet 121 of the plate, R is sporogony on the plane, parallel to the xy plane, is the top facial surface of the crown in the shape of a truncated square pyramid 120, contains the first four vertices of F, F', located in one correspondence with the four upper vertices of B, B' square columnar belt 110, and an octagon formed by four second peaks Del located in a position displaced in an outward direction (in the direction from the center line along the line connecting the center of the plate and the midpoint of the line segment FF') from the midpoint of the line segment connecting the pair of adjacent first peaks (for example, F and F') of the first four peaks, and the first four vertices of F, F', located in one correspondence with the four vertices B, B' of the belt 110. In conventional rectangular brilliant-cut 400 shown in Fig, each of the beveled facets 423 is a quadrilateral BCDF, which has as a pair of diagonal vertices B and F or B' and F', where peaks B and B' are the vertices of the upper cross section of the belt, and the nodes F and F' are the vertices of the facet 421 plates located exactly opposite of the above peaks B and B'; however, in the invention, is shown in figure 1, is made of a kink along the diagonal line CD, and the triangle BCD forms a lower beveled facet 124, and the triangle FCD forms the upper beveled facet 125. Every f is set 127 belt crowns is a trapezoid, formed party (for example, BB') of the upper cross section of the belt 110 and the sides BC and D', the closest to the above side BB', which are two sides of the lower beveled facets 124, each of which has as its vertices one of the two ends B and B' side BB'. Four facet 127 belt crowns and four lower beveled facet 124 alternately and horizontally distributed over the periphery of the upper cross section of the belt, forming a row. The second beveled facet 129 is a triangle CC Del, who formed a party SS', is parallel to and opposite edges VV' of the belt, one side of the facet 127 belt crowns, and the second vertex Del opposite the middle point of the SS' facet of the band, one of the vertices of the facet 121 of the plate. Facet 131 star is a triangle CFDel which is concluded between a party FDel facet 121 plates, side CF the upper beveled facet 125 and the side CDel second beveled facet 129. The top four beveled facet 129, four second beveled facet 129 and eight facets 131 stars are arranged horizontally between the facet plates and below the sequence, forming a row.

Pavilion 140 in the form of a square pyramid has on the surrounding surface of the four main facet 141 pavilion, eight facets 144, 144' of the belt pavilion and many FA is billing purposes 147, 149 formed by dividing the surface area between the main facet 141 pavilion and adjacent facets 144, 144' of the band pavilion. The main facet 141 pavilion is a quadrilateral bLRL', in which the top of the b square belt 110 and the lower tip (Caleta) R pavilion in the shape of a square pyramid is a pair of diagonal vertices. In this regard, the lower tip of R lies on the center line (z axis). The main facet 141 pavilion has vertices L and L' on its different sides, respectively, arranged on a plane which divides the center, namely the zx plane or another plane that divides the center, namely the yz plane; a pair of nearby main pavilion facets has a common side LR, connecting the top L, located on the plane that divides the center, located intermediate between a pair of nearby main pavilion facets and the lower tip of R. Facets 144, 144' of the belt of the pavilion are respectively triangles gbN, gbN', which are formed by the point g lies on the line the intersection of the lateral facet of the belt 110 and transverse plane divides the center of the bottom vertices b or b' belt and another point N located on a plane that divides the center. The main facet 141 pavilion (bLRL') and the facet 144 belt pavilion (gbN) have a common bottom vertex b of the belt, and the main facet 141' and pavilion facet 144' of the belt is of avilion (gb'N) have a common bottom vertex of b' band. In rectangular brilliant-cut 400 shown in Fig, facet 443 belt pavilion is a triangle Sbb', which side is the bottom edge bb' of the belt; however, in a rectangular diamond cut 100, shown in figure 3, the facets 144, 144' of the belt of the pavilion are triangles that have a common side gN, located on a plane that divides the center, and a little rejected from each other with a small angle relative to the sides of the gN. The intersection of any two facets 144, 144' of the belt of the pavilion is made such that the x-coordinate has a value of about 2.2 (assuming that the coordinates of point B correspond to (2,2)). There is a separate line between bM bL side, passing through the top b of the belt 110 and one of the sides of the main facet 141 pavilion and party bN facet 144 band pavilion, passing through the same node b of the belt 110 and having the end of N on the plane that divides the center (for example, the zx plane); the delimiting line bM passes through the same node b of the belt and has an end M on the same plane, which divides the center; the delimiting line bM between the two facets 141, 144 forms two triangles 147 and 149 having the common vertex shared by two facets 141, 144.

As is clear by comparing the above description of the improved rectangular brilliant cut 100 according to image ateneu, shown in Fig.1-3, with the description previously made for standard rectangular brilliant cut 400 shown in Fig-18, at the improved rectangular brilliant-cut 100 according to the invention beveled facet BCFD has a kink along the diagonal line CD, becoming thus divided into the lower beveled facet 124 and the upper beveled facet 125. The angle formed by the lower beveled facet 124 and facet 121 plates, considered in the plane x=y, passing through the top of the belt 110, will be called "the angle of the crown" at the point B. the Angle formed by the respective upper beveled facet 125 and facet 121 decals considered on the same plane x=y, will be called "upper corner of the crown". In the improved rectangular brilliant-cut diamond according to the invention, the preferred range of the angle of the crown when B varies from 23 to 26°and the preferred range of the upper corner of the crowns when B varies from 13 to 25°; and upper corner of the crowns when B is less than the angle of the crown when B. Since the upper corner of the crowns when B can be made smaller, even when the height of the crown (the height of the facet plates, measured from the plane of the belt remains the same, each of the first vertices of facet F 121 plates can be provided closer position to the center line of (z-axis). For the coordinate axes o f the data as shown in figure 1, taking the coordinates of B as (2, 2), x and y coordinates of the first vertex F facet plate 121 may be taken as(0,7-1,2; 0,7-1,2). Accordingly, the area of the facet stars 131 and the area of the second beveled facet 129 can be increased. In addition, even when the first vertex F is in such a position closer to the center line, the angle formed by the second beveled facet 129 and the xy plane, the plane zx, can be made smaller than the angle of the crown at point a, which is formed by facet 127 belt crowns and the xy plane (the plane parallel to the facet plates), considered in the zx plane, and therefore, the line of intersection between the facet of the band crowns 127 and the second facet of the band crowns 129 can be done serving, thus making the cut are possible.

When light rays incident on the diamond rectangular brilliant cut through the facets of the crown, reflected in the diamond and out of the facets of the crown, see on the z-axis, you can see that the number of light rays incident in a neighborhood of the vertices of facet F plates, beveled facets and second beveled facets and leaving a neighborhood of the diagonal lines of the facet plates and beveled facets visually especially noticeable in the second turn appreciable quantities of light rays emerging from the facets of the star and the Central part of catogorised belt crown. The intensity of light emitted from the oblique facets significant, but the area they occupy is small. Facet plate area is large, the size of his patterns are all the same, and the intensity of reflection from it is high. Shine facets stars and glitter of the second beveled facet is extremely weak in the usual rectangular brilliant-cut, but in the improved rectangular brilliant-cut diamond according to the invention the pattern of reflections that appear on the facets of the stars, second beveled facets and facet plates, all become similar to a degree that is preferred for visual perception and the Shine is becoming intense. In addition, the square facets stars and second beveled facets become large, which is extremely effective in terms of increasing the brightness of the reflection.

Figure 4 shows the patterns of reflection diamond subjected improved rectangular brilliant-cut 100 according to the invention, and for comparison on Fig shows the patterns of reflection diamond subjected to the usual rectangular brilliant-cut 400. In these figures, respectively, shows the first quadrant, between the x and y axes, parts of crown diamonds, depicted in figure 1 and 16. Border facet denoted by a thick solid line, and border patterns are denoted by thin lines. Figures, inscribed lusory, respectively indicate the effective number of visually perceptible reflection ray patterns. Patterns with minus signs before the numbers are patterns that are formed on the crown of the light rays incident on the rear side. In addition, for small designs shown only the border.

As can be seen from a comparison of the patterns in figure 4 and 19, patterns, reflections, all of which are more similar in size to visual perception, observed on the facet of the stars, second beveled facets and facet plates in diamond 100, subjected to the improved rectangular brilliant-cut diamond according to the invention, and not in diamond 400 subjected to the usual rectangular diamond cut. In contrast, in the conventional rectangular brilliant-cut 400 patterns facets stars and second beveled facets small, and light rays from the rear sides look like a more intense patterns. As described above, light patterns back look more intense in the usual rectangular brilliant-cut so that the brilliance of the diamond is additionally diminished in the case when the diamond is inserted into the frame.

Characteristic values and the total number of reflections for improved shape rectangular brilliant cut proposed in the present description, according to the invention, and of the usual form rectangular brilliant cut SOBR who are in table 1. In table 1 CB denotes the angle of the crown(in degrees) when B, UCB denotes the upper corner of the crowns when B (in degrees), PB denotes the pavilion angle (in degrees) when B, CA denotes the angle of the crown (in degrees) for A, F denotes the coordinates of the point F (x=y, therefore, provides only one value), Delx denotes the x coordinate for Del, C denotes the x coordinate for C, Lx, Mx, Nx and Sx denote the x-coordinates of points L, M, N, and S, respectively. Item 20-45 denotes the effective number of visually perceive the reflected beams received from the light rays impinging at angles from 20 to 45 degrees relative to the axis z, 0-90w indicates the number of visually perceive the reflected beams received from the incident beams, weighted with a weighting factor cos2Θwhere Θ is the angle of incidence relative to the z axis, and the item "AVERAGE" means the arithmetic mean of these two types of quantities visually perceive the reflected rays. As is clear from table 1, the brilliance of the diamond rectangular brilliant cut according to the invention is significantly enhanced compared with the conventional diamond rectangular brilliant cut.

Table 1
Improved rectangular brilliant cut (example 1)The usual p is amoralna brilliant cut (example for comparison)
SampleAA
SV2523
UCBof 17.5-
PB4043
CA4447
F1,11,4
Delx1,41,66
C1,71,84
Lx0,30,19
Mx0,70,55
Nx1,10,8
Sx-1,1
20-45401,9111,7
0-90w578,9245,0
Average490,4to 178.4

The following is a description on the basis of preferred values for the characteristic values for the form of the diamond improved rectangular brilliant-cut diamond according to the invention. The average number of visually perceived reflected rays as a function of the angle of the pavilion RV (in degrees) at the point B when it is modified in the range from 37 to 43 degrees, as shown in figure 5, is 450 or more for the corners of the pavilion RV in the range from 38 to 42 degrees, and accordingly, predpochtitel the initial range of the angle of the pavilion RV ranges from 38 to 42 degrees.

As shown in Fig.6, the average number of visually perceived reflected rays becomes large for the crown angles SV (in degrees) at the point B from 23 to 26 degrees. Fig.6 shows the average number of visually perceived reflected rays as a function of the angle of the crown of ST (in degrees) in the range from 22 to 27 degrees at point B for diamond, subjected rectangular brilliant-cut, in which the angle of the pavilion PB at the point B is 41 degrees, and the angle crown CA at point a is 45 degrees, and diamond subjected rectangular brilliant-cut, in which the angle of the pavilion PB at the point B is 42 degrees, and the angle crown CA at point a is 43 degrees. Making the angle of the crown falling within the preferred range from 23 to 26 degrees, the average number of visually perceived reflected rays becomes larger, and the patterns of reflection are becoming more similar in size, which is preferable for visual perception. For rectangular brilliant cut with the angle of the pavilion is 41 degrees at the point B/angle crowns 25 degrees at the point B and the rectangular brilliant cut with the corresponding values 39 C/24 C, and the average number of visually perceptible reflection rays is shown in Fig.7 as a function of the upper angle of the crown UCB (in degrees) in the range from 10 to 25 is the radius; the average number of visually perceptible reflection rays is equal to 400 and more for the upper corners of the crown within the range from 13 to 25 degrees. In addition, a necessary condition is that the top corner of the crown UCB was less than the angle of the crown CB, because otherwise machining becomes impossible.

Reflection is more intense in the case of F values equal to 1.1 on the facet plates than in the case of F values equal to 1.2, and, in addition, reflection is more intense when the value of F equal to one, than when the value of F equal to 1.1. However, when the value of F becomes 0.7 or less, the angle of the crown of the second beveled facet may be greater than the angle crown CA at point a, so that the mechanical processing becomes impossible. Accordingly, the value of F should be from 0.7 to 1.2. The angle of the crown SA (in degrees) at point a falls within the range from 43 to 47 degrees with a mean of about 44-45 degrees, no significant significant impact.

In that case, if the value Delx does not exceed the value of F, the processing is not possible; in order to get the dimensions of the facet 131 stars and the second beveled facet 129 roughly the same value Delx is preferably from 1.3 to 1.6.

In order to reflect the light rays so that they passed through the facet 121 plates, facets 131 stars and the second with osennye facets 129, it is recommended that the main facets 141 pavilion and other facets 147, 149 pavilion was located almost exactly under the facet 121 of the plate, and preferably, the values of Lx, Mx and Nx were all less than the value F.

On Fig-10 shows an example of 2 diamond subjected improved rectangular brilliant-cut diamond according to the invention, and Fig-14 shows an example of a 3 diamond subjected to the same cut. Fig and 12 are a top view, figure 9 and 13 are a side view, and figure 10 and 14 are views from below. As is clear when comparing figures 1, 8 and 12, the configuration of the crowns on them in all cases the same. As is clear when comparing figures 9 and 10 with 2 and 3, the improved rectangular brilliant-cut 200 of example 2 between the side bL passing through the bottom vertex b of the belt 210 and one of the sides of the facet 241 pavilion and party bS facet 244 belt pavilion, passing through the same node b of the belt 210 and having end S on the zx plane, there are two separate surface lines bM, bN, passing through the same node b and, respectively, with the ends of M, N on the zx plane, and there are three facet 247, 249 and 251 between the two facets 241 and 244.

It is clear from the comparison Fig and 14 with figures 9 and 10, the improved rectangular brilliant-cut 300 of example 3 shown in Fig and 14 facet 343 belt pavilion has no arrangement is in the middle point and the edge bb' of the belt 310, while in the improved rectangular brilliant-cut 200 of example 2, shown in figures 9 and 10, a facet of the band pavilion has a fracture along side gS, passing through the center of the front side of the belt, and is divided into two facet 244 and 244'. The first quadrants of the patterns of reflection for examples 2 and 3 shown in 11 and 15 respectively. In addition, table 2 shows typical values and the number of visually perceived reflected rays of these forms. Symbols used in table 2 are the same as the symbols in table 1. It is clear from the values of the quantities visually perceive the reflected rays on the examples 1-3, the increase in the number of facets of the pavilion, by increasing the number of the delimiting lines dividing the portion between the facets of the pavilion and the surrounding facet of the band pavilion, does not necessarily increase the number of visually perceptible reflection rays. The smaller the number of facets of the pavilion, it is more preferable from the viewpoint of fewer stages of machining. However, as shown in examples 1 and 2, the separation of the facets belt pavilion in its Central parts makes all the patterns reflect similar to each other.

Sample
Table 2
Example 2Example 3
AA
SV24,024,0
UCBof 17.5of 17.5
PB39,039,0
CA45,045,0
F1,11,1
Delx1,41,4
C1,71,7
Lx0,20,3
Mx0,50,7
Nx0,81,0
Sx1,21,4
20-45397,0437,9
0-90w445,2598,8
Average421,1518,3

In the above descriptions of examples 1-3 detailed descriptions were made for rectangular diamond cut in the shape of a square, and such description is also applicable to another quadrilateral other than square, such as a rectangle. When one side is significantly longer than the adjacent side of the rectangle, the number of lines that divides the part of the pavilion, adjacent to the longer side between the main pavilion facet, and a facet of the band pavilion, you what to do more than the number of lines dividing the nearby part of the pavilion, adjacent to the shorter side. It is possible to provide between the main pavilion facet, and a facet of the band pavilion or five triangular facets in the part adjacent to the longer side, and three triangular facet in the part adjacent to the shorter side, or three or four triangular facet in the part adjacent to the longer side, and two or three triangular facet in the part adjacent to the shorter side. In such a rectangular diamond cut, it is preferable that the angles formed by the four main facets pavilions and a horizontal cross-section of the band, were made identical to each other.

As was described in the improved rectangular brilliant-cut diamond according to the invention beveled facets near the four peaks crowns have a break in the diagonal line parallel to the horizontal cross section of the belt, and thus, each of the beveled facet is divided into the lower beveled facets and the upper beveled facets. Accordingly, the facets of the star in the crown and the second beveled facets, you can make sure that they had small angles of deviation from the horizontal and large areas. While the patterns of the reflection facets of the stars, second beveled facets and facet plates all be similar p is the size of the extent, which is preferred for visual perception, and their Shine is becoming intense. Getting facet stars and second beveled facets with small angles to the horizontal, with the increase of the facets of the star and second beveled facets allows you to get a cut, which is endowed with an extremely intense reflection (the number of visually perceived reflected rays).

1. Diamond improved rectangular brilliant cut, containing a rectangular columnar band, crown, having an octagonal facet plates on the top of the crown and formed above the belt, and a pavilion below the belt, in which a rectangular columnar belt has an upper rectangular cross-section parallel to the facet plates on the border between the belt and the crown, the crown has four trapezoidal facet of the band crowns, four lower triangular beveled facet, four upper triangular beveled facet, four second triangular beveled facet and eight triangular facets stars on the outer surface surrounding the crown, while the facet plate has the first four peaks and four second vertex where each of the first four peaks located near each of the four vertices of the upper cross section of the belt, and each of the four second vertex from Agena at the point shifted in the direction of the line (called hereinafter "Central line"), vertical with respect to the facet plates, from the center point between two adjacent first peaks, four facet of the band crowns and four lower beveled facet located on the same line, alternating with each other, forming a row along the border and above it, four facet of the band of the crown, each of which has a base coinciding with the side of the upper cross section of the belt, and each of the lower beveled facets has a top, two sides, passing through a vertex and a base opposite the apex, while the peak coincides with the vertex of each of the upper cross section of the belt and is common to the two facets of wreath crowns on both sides of each lower beveled facet, each of the two sides coincides with the side of each of the two facets of the band of the crown, and the base has two ends, each of which coincides with a vertex that belongs to each of the two facets of the band of the crown, the top four beveled facet, four second beveled facet and eight facets stars are in one line, forming another row between the facet plates and next, with the facets of wreath crowns and lower beveled facets, each of the top beveled facets has a vertex coinciding with one of the first vertices of the facet plates, and on what basis, coinciding with the base of the lower beveled facets, each of the lower beveled facets forms an angle with the facet plates, greater than the angle between each of the upper beveled facets and facet plates, and the pavilion contains four main rectangular facet of the pavilion and many triangular facets of the band pavilion at the external surface surrounding the pavilion, with each of the main facets of the pavilion has two opposite vertices, one of which is the bottom tip of the diamond, located on the Central line and the other of which coincides with each of the lower peaks of the belt, and two sides, each of which coincides with the side of belonging to the neighboring main pavilion facet on the plane (hereinafter called "the plane that cuts through the center"), passing through a Central line and through the center between the two lower vertices of the belt.

2. Diamond improved rectangular brilliant-cut diamond according to claim 1, in which the angle between the lower beveled facet and facet plate is 23-26°, the angle between the upper beveled facet and the facet plates is less than the angle between the lower beveled facet and the facet plates, and equal 13-25°and the main pavilion facet is at an angle 38-42° to the facet labels.

3. Diamond improved rectangular brilliant cut on the .1, in which the pavilion contains four triangular facet of the band pavilion, each of which has a base, which coincides with the connecting line between two adjacent bottom vertices of the belt, and a top opposite the base plane, which divides the centre, crossing the base, one of the main pavilion facets and the facet of the band pavilion, nearby in relation to the main pavilion facet, have a common vertex coincides with one of the lower peaks of the belt, the main facet of the pavilion has a side passing through a common vertex and end on the same plane, which divides the center facet of the band pavilion, nearby on relation to the main pavilion facet has a side passing through a common point and the other end on the same plane, which divides the center, where between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main facet of the pavilion, the pavilion has at least two triangular facet, with a common vertex and separated by at least one adjacent delimiting line through a common vertex and through the other end on the same plane, which divides the center.

4. Diamond improved rectangular brilliant-cut diamond according to claim 3, in which the pavilion is one of the delimiting line passing through the common vertex of the band and the another end on the same plane, dividing the center, while receiving two triangular facet, with a common vertex and adjoining delineating line between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main pavilion facet.

5. Diamond improved rectangular brilliant-cut diamond according to claim 3, in which the angle between the lower beveled facet and facet plate is 23-26°, the angle between the upper beveled facet and the facet plates is less than the angle between the lower beveled facet and the facet plates, and is 13-25°and the main pavilion facet is at an angle 38-42° in relation to the facet labels.

6. Diamond improved rectangular brilliant-cut diamond according to claim 3, in which, assuming that the Central line passes through the origin of coordinates x, y (0,0) and that one of the lower peaks of the belt is located at the point with coordinates x, y (2,2), the first vertex of the facet labels nearby the top to the bottom of the band, has coordinates x, y(0,7-1,2; 0,7-1,2), the three lines that are closest to the Central line, which include the side of the main pavilion facet, side facet of the band pavilion and delineating the line between the side of the main pavilion facet and side facet of the band pavilion, nearby in relation to the main pavilion facet, crossed by a plane that cuts through the center, the hands, located closer to the origin than the x coordinate of the first vertex of the facet plates, and a second top facet plate has an x coordinate equal to 1.3 to 1.6.

7. Diamond improved rectangular brilliant-cut diamond according to claim 1, in which the pavilion has eight triangular facets of the band pavilion, each of which has a vertex at the intersection between the lateral facet of the belt and the plane that cuts through the center, crossing the lateral facet of the band, another peak, coinciding with the lower apex of the lateral facet of the band, and a separate peak on the plane that divides the center, with each of the facets of the band of the pavilion has a direction in the plane that divides the center, shared with the adjacent facet of the band pavilion, which has a peak coinciding with another lower top of the lateral facet of the band two neighboring facet of the band pavilion have such an angle between them that General direction on the plane that divides the centre, forms a ridge between them, one of the main pavilion facets and the facet of the band pavilion, nearby in relation to the main pavilion facet, have a common vertex coincides with one of the lower peaks of the belt, the main facet of the pavilion has a side passing through a common point, and end on the same plane, which divides the center facet of the band pavilion, nearby in relation to the main facet PA is Ilona, has side passing through a common point and the other end on the same plane, which divides the center, where between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main facet of the pavilion, the pavilion has at least two triangular facet, with a common vertex and separated by at least one adjacent delimiting line through a common vertex and, in addition, through the other end on the same plane, which divides the center.

8. Diamond improved rectangular brilliant-cut diamond according to claim 7, in which the pavilion is one of the delimiting line passing through the common vertex of the belt and the other end on the same plane, which divides the center, while receiving two triangular facet, with a common vertex and adjoining delineating line between the side of the main pavilion facet and the side facet of the band pavilion, nearby in relation to the main pavilion facet.

9. Diamond improved rectangular brilliant-cut diamond according to claim 7, in which the angle between the lower beveled facet and facet plate is 23-26°, the angle between the upper beveled facet and the facet plates is less than the angle between the lower beveled facet and the facet plates, and is 13-25°and the main pavilion facet is at an angle 38-42° as far as the structure to the facet labels.

10. Diamond improved rectangular brilliant-cut diamond according to claim 7, in which, assuming that the Central line passes through the origin of coordinates x, y (0,0) and that one of the lower peaks of the belt is located at the point with coordinates x, y (2,2), the first vertex of the facet labels nearby the top to the bottom of the band, has coordinates x, y(0,7-1,2; 0,7-1,2), the three lines that are closest to the Central line, which include the side of the main pavilion facet, side facet of the band pavilion and delineating the line between the side of the main pavilion facet and side facet of the band pavilion, nearby in relation to the main pavilion facet, crossed by a plane that cuts through the center points located closer to the origin than the x coordinate of the first vertex of the facet plates, and a second top facet plate has an x coordinate equal to 1.3 to 1.6.



 

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