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Moissanite gem with bright carving surface and cutting and grinding processing methods thereof

A technology of moissanite and cutting, which is applied in the field of faceted bright cut moissanite gemstones and their cutting and grinding processing, and can solve problems such as the difficulty in the optimal cutting ratio of moissanite gemstones

Active Publication Date: 2013-11-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moissanite is an anisotropic crystal, which belongs to a one-axis positive optical crystal. Its optical axis is parallel to the crystal axis of the crystal (ie, the C axis), and its birefringence is 0.043. Therefore, the refractive index of different crystal planes of the material is different. Makes it difficult to accurately calculate the optimal cutting ratio for moissanite gemstones

Method used

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  • Moissanite gem with bright carving surface and cutting and grinding processing methods thereof
  • Moissanite gem with bright carving surface and cutting and grinding processing methods thereof
  • Moissanite gem with bright carving surface and cutting and grinding processing methods thereof

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Effect test

Embodiment 1

[0045] Embodiment 1, the standard round brilliant cutting shape of moissanite gemstone, such as figure 2 As shown, the surface C of moissanite is used as the table top, the table top 11 is a regular octagon, and the crown has eight crown main faces 13, sixteen upper waist faces 14, and eight star facets 12; the pavilion has eight pavilion main faces Face 17 and sixteen lower waist faces 16 are cut and ground according to the following angles and ratios:

[0046] The crown angle is 34°~35°, the pavilion angle is 41°~42°, the platform width ratio is 49%~51%, the crown height ratio is 17%~18%, the pavilion depth ratio is 43%~44%, the total depth The ratio is 62% to 65%, the star facet angle is 29° to 30°, the upper girdle angle is 35° to 37°, and the lower girdle angle is 42° to 44°. as described in the table below

[0047]

[0048] The standard round brilliant cut shape of embodiment 2, 6H moissanite gemstone, such as figure 2 As shown, the surface C of moissanite is use...

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Abstract

The invention relates to a moissanite gem with bright carving surface and cutting and grinding processing methods of the moissanite gem. For the moissanite gem, the crown angle is 34-35 degrees, the pavilion angle is 41-42 degrees, the table width is 49%-51%, the crown height is 17%-18%, the pavilion depth is 43%-44%, and the total depth is 62%-65%. The methods comprise cutting and grinding angle and proportions of various common bright cutting types of moissanite gems. According to specific properties of crystal axis orientation, refractive index, color, color, transparency and the like of the moissanite gems, after the cutting and grinding angles and proportions are adopted, comprehensive and optimized gloss, flicking and color of the curved-surface moissanite gems are displayed.

Description

technical field [0001] The invention relates to a cutting and grinding method of a moissanite gemstone, in particular to a faceted brilliant-cut moissanite gemstone and a cutting and grinding method thereof. Background of the invention [0002] Due to the rarity of natural gemstones, craftsmen often cut gemstones into cabochons or various irregular shapes in order to preserve the volume of gemstones as much as possible. Color and other effects can not get the best show. Since the beginning of the last century, with the change of people's consumption concept, more and more attention has been paid to the beauty of gemstones. By following the optical laws of crystals and setting the angle and proportion of cutting, the brightness and fire of gemstones can be optimized. In 1919, Marcel Tolkowsky published the famous "Diamond Design" book, based on the refractive index of diamonds, and taking into account the effects of brightness and fire, he calculated the cutting angle and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A44C17/00A44C27/00C30B29/36
Inventor 徐现刚田亮光付芬
Owner SHANDONG UNIV
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