CN102238885A

CN102238885A - Decagonal shaped diamond which displays hearts and arrows pattern

Info

Publication number: CN102238885A
Application number: CN2008801319816A
Authority: CN
Inventors: R·里德列维奇
Original assignee: Sundiamond USA Corp
Current assignee: Sundiamond USA Corp
Priority date: 2008-09-16
Filing date: 2008-09-16
Publication date: 2011-11-09
Anticipated expiration: 2028-09-16
Also published as: WO2010033099A1; CA2737469C; US20090178438A1; HK1162269A1; CN102238885B; CA2737469A1

Abstract

A decagonal shaped diamond, adapted to display a hearts and arrows pattern when exposed to light comparable to the hearts and arrows pattern in a round diamond. The decagonal shaped diamond should be cut to form ten main crown facets of substantially equal size symmetrically arranged relative to one another surrounding a table facet twenty star facets with two star facets polished on every main crown facet, ten main pavilion facets, an equal number of crown half facets as pavilion half facets and ten main girdle facets with the girdle facets polished at a given angle relative to one another for forming the decagonal shape of the diamond.

Description

The decagon diamond that shows eight hearts, eight arrow patterns

Technical field

The present invention is U.S. Patent application No.11/744,571 part continuation application, its disclosure is attached to this paper by reference, and relate to the cutting diamond field, particularly relate to diamond, be exposed to light this pattern of following time and be comparable to eight hearts, the eight arrow patterns that produce by the circular cutting diamond of perfection substantially with the odd plots of land that can be cultivated shape that is suitable for producing eight hearts, eight arrow patterns.

Background technology

Can show eight hearts, eight arrow patterns when being exposed to light circular cutting diamond of following time, as long as this circle cutting diamond has the perfect symmetric shape of being close to, and have equal and cut surface symmetrical, that in narrow relatively proportion, polish, as instructing in the following table 1.Intimate perfect circular cutting diamond with eight hearts, eight arrow patterns provides briliancy, color and the unapproachable light processing attribute of any in the market other shape diamond.Although except circle, diamond is cut into many known geometries usually, for example heart-shaped, ellipse, pyriform, olive pointed (marquis), princess is square, emerald shape etc., and it is current the unknown that diamond is cut into decagon, this decagon will produce eight hearts, eight arrow patterns, and these eight hearts, eight arrow patterns are comparable to by being close to eight hearts, the eight arrow patterns that the round-shaped circular cutting diamond of ideal symmetrical produces being exposed to light following time.

Before this, in the diamond industry, generally believe to have only circular cutting diamond can produce real eight hearts, eight arrow patterns.This idea mainly is based on circular cutting diamond and has so intimate perfect symmetric shape, and its all crown can be cut into identical angle at an easy rate with the booth face, differential seat angle between all booth face angles is less than 0.3 °, angle tolerance between the main crown is less than 0.4 °, and the angle tolerance of auxiliary crown is less than 0.3 °.This has caused the widely accepted in the industry idea of diamond: only may be polished to look be on the diamond of intimate perfect symmetric shape of round diamond, use known on circular cutting diamond the narrow angle tolerance of generation eight hearts eight arrow patterns obtain eight hearts, eight arrow patterns.

The decagon diamond has the geometry that significantly is different from round diamond.Therefore, if a people accepts to have only circular cutting diamond could produce the extensive received idea of real eight hearts, eight arrow patterns, be difficult to the decagon that the imagination can be polished to diamond eight hearts, the eight arrow patterns that produce eight hearts, the eight arrow patterns that are comparable to circular cutting diamond.

In circular cutting diamond, have only when tangent plane requirement, angle parameter and aligned relationship are as shown in table 1 below, eight hearts, eight arrow patterns just can occur:

Table 1

The shape of diamond is an ideal symmetrical;

8 main crowns and 24 auxiliary crowns;

8 main bottom surfaces and 16 auxiliary bottom surfaces;

All main facets (bizet and bottom) must be to polish each other in perfect 45;

All facets are perfect alignment;

The size of all main facets in bottom equate and the scope that is in from 40.6 ° to 41.0 ° angle;

The size of all auxiliary facets in bottom equates, angle of living in is than accurately steep 1.2 ° of main facet (main bottom angle 40.6 ° to 41.8 ° to 42.2 ° of 41.0 °+minor bottom angles);

All main crown sizes equate and the scope that is in from 33.8 ° to 35.1 ° angle.They must be on main bottom surface perfect alignment;

All auxiliary crown sizes equate and on main crown and auxiliary bottom surface perfect alignment, and polish with equal angles;

The perfect cutting ratio is: total depth 59.4%-62.4%, crown height 14.5%-16.0%, the thick 1.5%-2.95% of waist, circularity 99.0%-100%, platform size 53.0%-57.5%.

Summary of the invention

Diamond of the present invention is cut into and is exposed to the decagon that light following time is suitable for showing substantially the eight hearts eight arrow patterns identical with eight hearts, the eight arrow patterns that show in the round diamond.Decagon cutting diamond of the present invention comprises: ten main crowns, ten main booth faces, 20 star faces, two star faces of polishing on each main crown, hat triangle facet of equal number (crown half facet) and booth triangle facet (pavilion half facet), and ten main central planes, these central planes are used to form the decagon shape of diamond relative to each other with the given angle polishing.

Description of drawings

When read in conjunction with the accompanying drawings, describe in detail below of the present invention, other advantage will be conspicuous:

Fig. 1 is the top view of decagon diamond of the present invention, has shown ten main crowns of symmetric arrangement on the table top side of diamond;

Fig. 2 is another top view of decagon diamond of the present invention, is similar to Fig. 1, has shown main crown structure and symmetric arrangement relative to each other;

Fig. 3 is another top view of decagon diamond of the present invention, is similar to Fig. 2, has shown the structure and the layout of main crown and the main booth face of pairing;

Fig. 4 is another top view of decagon diamond of the present invention, is similar to Fig. 2, has shown the layout and the relation of hat star face, hat triangle facet and main crown;

Fig. 5 is the booth view of decagon diamond of the present invention, has shown around the diamond center or ten main booth faces and 20 booth triangle facets of vertex (vertices) symmetric arrangement;

Fig. 6 is another view of decagon diamond of the present invention, is similar to Fig. 4, has shown the hat star face of arranging with respect to main crown, the projection of hat triangle facet and main booth face; And

Fig. 7 is the side profile figure of decagon diamond of the present invention.

The specific embodiment

Diamond is that function is served as a kind of crystal by the prism of reflection and refraction divergent rays.Diamond 10 of the present invention, shown in Fig. 1-7, the decagon that has main crown with ten basic equivalent size (mcf ' s), each main crown (mcf) is aimed at another relative main crown (mcf) with the symmetric arrangement around table top (tf), ten main booth faces (mpf ' s), each main booth face is aimed at main crown, the hat star face of 20 basic equivalent size (cs ' s) in, go up two that polish in these hat star faces at each main crown (mcf), the number of hat triangle facet (chf ' s) equals the number of booth triangle facet (phf ' s), preferably corresponding to the number of hat star face (csf ' s), and ten main central planes (gf ' s) in, central plane is used to form the decagon shape of diamond relative to each other with the given angle polishing.

Central plane gf ' s at first is polished the central plane gf ' s that ten sizes equate, to provide diamond decagon geometry, its all main facets are consistent with the shape of stone.The size of each central plane should equate, and be in accurate angle with respect to each adjacent central plane, preferred 36 °.Main subsequently crown is preferably polished in 33.8 ° to 35.2 ° of angular ranges, and preferably has the equivalent size and the degree of depth.Polished then and main crown of main booth face and main central plane are aimed at, preferably in 40.6 ° to 41.1 ° of angular ranges.

20 hat star faces and 20 hat triangle facets are polished on decagon diamond 10 subsequently, then polish booth triangle facet.Booth triangle facet is preferably polished in 41.5 ° to 42.2 ° angular range.Hat triangle facet is preferably polished in 37 ° to 40.8 ° angular range.20 hat star faces should be polished, and making provides two star faces on each main crown.Should be understood that two star faces of polishing cause abnormal mulle on each main crown, need guarantee to show non-warping eight hearts, eight arrow patterns.In addition, the angle tolerance between all booth triangle facets should be no more than 0.8 °, and the angle tolerance of hat triangle facet should be no more than 0.8 °.

Facet is aimed at and should preferably be used the microscope of 100 times of enlarging lens to determine precision as far as possible near perfect.

In order to produce the decagon diamond that has the real eight hearts eight arrow patterns identical with eight hearts, the eight arrow patterns of circular cutting, this diamond should be cut into and satisfy table 1 optimal parameter as described below:

Table 1

Total depth: 56.4%-66.8%

Platform size: 53.0%-60.2%

Booth is dark: 41.2%-46.5%

Crown height: 13.4%-16.8%

Guan Jiao: 33.8%-35.2%

Waist is thick: 0.6%-7.5%

Angle difference between all main facets need be less than 0.5 °, and the angle difference between all astral crowne faces and half facet need be less than 0.7 °.Main facet all should be equal fully aspect the angle of using, size, the degree of depth, and be in 0.4 ° angle tolerance.

Claims

1. decagon diamond, it is exposed to eight hearts, the eight arrow patterns that light following time is suitable for showing eight hearts, the eight arrow patterns that are comparable in the round diamond, comprise: about ten main crowns of table top symmetric arrangement, 20 star faces, two star faces of polishing on each main crown, ten main booth faces, the hat triangle facet of equal number and booth triangle facet, and ten main central planes, described central plane is relative to each other with the given angle polishing, to form the decagon shape of described diamond.

2. as the decagon diamond that claim 1 limited, wherein: described central plane is polished to the central plane of ten equivalent size, and these central planes form 36 ° of angles with respect to the described central plane on its each adjacent side.

3. as the decagon diamond that claim 2 limited, also comprise: 20 hat triangle facets and 20 booth triangle facets.

4. as the decagon diamond that claim 3 limited, wherein: described main crown is in 33.8 ° to 35.2 ° angular range and polished in 0.4 ° angle tolerance.

5. as the decagon diamond that claim 4 limited, wherein: described ten main booths are polished in 40.6 ° to 41.1 ° angular range in the face of accurate described main crown and central plane.

6. as the decagon diamond that claim 5 limited, wherein: described ten main booth faces from the center that is positioned at described diamond or the common point of vertex (vertices) extend.

7. as the decagon diamond that claim 6 limited, also comprise: the booth triangle facet of 12 triangle geometries, in the described booth triangle facet two are formed on each main booth face with symmetric arrangement.

8. as the decagon diamond that claim 6 limited, wherein: each booth triangle facet is polished in 41.5 ° to 42.2 ° angular range, and the angular range of described hat triangle facet should be between 37.0 ° to 40.8 °.

9. as the decagon diamond that claim 8 limited, it is characterized in that: the angle tolerance between described booth triangle facet and the described hat triangle facet is no more than 0.8 °.