SU1743563A1 - Precious stone - Google Patents

Abstract

The invention makes it possible to increase the utilization rate of diamond raw materials, to improve the aesthetic appearance and play of a diamond by making the crown and the pavilion with four brown ones. The tiers are formed by trapezoidal granite shapes, and the heights of the crown faces, respectively, are referred to as 1: 0.75: 0.5: 0.25, and the heights of the faces of the pavilion are 4: 2: 1: 0.5, and the angular faces are paired with an angle between them, lying in a plane parallel to the girdle plane, equal to 135 ± 5 ° C; Zil.

Description

The invention relates to the jewelry industry, in particular to the technology for processing diamonds into diamonds.

The step-shaped cut form is known, containing a crown and a pavilion, having sides of faces, a girdle and a platform.

The disadvantage of this type of cut is that the edges are of considerable size and the play of stones does not appear to the maximum.

The aim of the invention is to increase the utilization rate of rough diamonds.

The goal is achieved by the fact that in a well-known stepped form, a cut containing a crown and a pavilion with faces, girdles and a platform, a crown and a pavilion are four-colored, the lines are formed by trapezoidal faces and the heights of the crown faces are respectively 1; 0 , 75: 0.5: 0.25, and the height of the pavilion faces, respectively, is 4: 2: 1: 0.5, with the corner faces

paired with an angle between them, lying in the girdle plane, equal to 135 ± 5 °

The angles of inclination of the faces of the crown are as follows: 1st Rus "1 50-55g; 2nd Russian Sy 43-50 °; 3rd Rus oz 39-43 °; 4th Rus al 30-34.

The heights of the crown faces are as follows: 1st U H1 2 nd H2 afe; W th

Rus Ns Zh1; 4th Russian H4 Ш7 where hi, h2, hs, h4 are the heights of the Rus, respectively; Hi, H2, Hz, H4 - respectively the height of the faces.

The angles of inclination of the pavilion faces are as follows: 1st Rus / 1 50-55 ° С; 2nd Russian / Over 40-45 °; 3rd Rus 35-40 °; 4th Russian PA 30-35 °.

The pavilion face heights are as follows:

where hi1, h12, h1s, h are the corresponding heights of the Rus; Hi, H2, Hz, H4 - respectively the height of the faces.

w

Yo

2

coke

Os

with

The boundary values of the angles of inclination of the faces are chosen in such a way as to obtain the greatest brilliance and play of the diamond, in order to maximize the optical properties of the diamond.

When the angles of inclination of the edges of the upper part (crown) of the 1st Rus is less than 50 °, the 2nd Rus is less than 43 °, the 3rd Rus is less than 39 °. 4th rusa less than 30 °, and the angles of inclination of the lower part (pavilion) of the 1st rusa less than 50 °, 2nd rusa less than 40 °, 3rd rusa less than 35 °, 4th rusa less than 30 ° will browse the ribs, which reduces jewelry quality.

When the angles of inclination of the edges of the upper part (crowns (1st Rus over 55 °, 2nd Rus over 50 °, 3rd Rus over 43, 4th Rus over 34 °, and the down angles of the pavilion) 1 th rus more than 55 °, 2nd rus more than 45 °, 3rd rus more than 40 °, 4th rus more than 35 ° - the consumption of rough diamonds increases significantly.

The ratio of the heights of the faces of the crown is 1: 0.75: 0.5: 0.25 related to the angles of inclination of the faces of the respective Rus and allows one to withstand the sharpness of the edges of the top, the proportionality of their gradual inclination to the site and visually combine them with the corresponding edges of the bottoms.

The ratio of the heights of the faces of the pavilion 4: 2: 1: 0.5 allows one to achieve the maximum diamond play due to the double reflection of the faces of the previous rus at the next faces.

Corner faces are paired with an angle of 135 ± 5 ° between them. Performing this angle less than 130 ° or more than 140 ° violates the geometry of the cut, which reduces the quality of jewelry diamond.

FIG. 1-3 presents the gemstone of the proposed step-shaped cut, general view; in fig. 1-3 accept the following notation for linear and angular cut parameters1

a is the angle of inclination of the faces 1; the top of the upper part (crowns);

"2 - the angle of inclination of the faces of the 2nd Rus upper part;

“3 is the angle of inclination of the faces of the 3rd rus of the upper part;

al is the angle of inclination of the edges of the 4th Rus upper part;

R - the angle of inclination of the faces of the 1st Rus of the lower part (pavilion);

/% - the angle of inclination of the faces of the 2nd Rus bottom;

 - the angle of inclination of the faces of the 3rd rus of the lower part;

0

five

0

five

0

five

0

five

0

five

/ FOR - the angle of inclination of the edges of the 4th Rus bottom;

hi - height of the 1st rus crown;

h2 is the height of the 2nd rus crown;

gp - the height of the 3rd rus crown;

h is the height of the 4th rus crown;

h 1 - the height of the 1st rus of the pavilion;

h 2 - the height of the 2nd floor of the pavilion;

h s - the height of the 3rd rus of the pavilion;

h 4 - the height of the 4th rus of the pavilion;

Hi, Na, Nz, H4 - the height of the faces of the crowns;

Н1, Н1з, Н14 are the heights of the faces of the Rus Pavilion.

The step shape of the cut consists of pavilion 1, girdle 2, crown 3 and platform 4.

The crown 3 has four russes of faces I, II, III, IV formed by trapezoidal faces: side 5 and paired angular 6. Angles of inclination of faces 5 and 6 to the plane of the girdle are respectively: 1st tier and 50-55 °; 2nd Russian 02. 43-50 °; 3rd Rusa "s39-43 °; 4th Rusa ODZO-34.

Pavilion 1 also has four russes of faces I, II, III, IV formed by trapezoidal faces: side 7 and paired corner 8. The angles of inclination of faces 7 and 8 to the plane of the girdle are respectively: 1 rus 50-55 °; 2nd Rus Dg 40-45 °; 3rd Russe 35-40 °; 4th Rus 30-35 °.

An increase in the utilization rate of diamond raw materials is achieved by making additional faces of faces on the crown and pavilion and double angled faces.

The proposed step-cut form of gem cutting increases the utilization rate of rough diamonds up to 5.4%.

Claims (1)

Invention Formula A gemstone containing a crown and a pavilion, having sides of faces, a girdle and a platform, characterized in that, in order to increase the utilization rate of rough diamonds, the crown and pavilion are made at least quadruple, while the Russ are formed with trapezoidal shaped granules and the heights of the crown faces are respectively 1: 0.75: 0.5: 0.25, and the heights of the pavilion faces are respectively 4: 2: 1: 0.5, and the angular faces are paired with an angle between them lying in a plane parallel to the plane ti girdle equal to 135 ± 5 °. ± Phie-f s 6 FIG. 2 Fig.Z