A kind of processing method of princess cut diamond

Abstract

A machining method of a princess cut diamond includes: cutting a table top, polishing a square body, machining the bottom, dividing each of the four lower arc-shaped edge of the square body into two arc-shaped edges from the middle, respectively using the middles of the 8 arc-shaped edges as the starting points, using 54-60 degrees to polish angles towards two sides, and polishing 8 triangular faces on the bottom layer; using 40.5-41.5 degrees to polish four pointed faces on the edges, facing the four corners of the square body, of the bottom; machining a crown part, to be more specific, respectively using the four arc-shaped edges of the square body of the table top as the starting edges to use 35-38 degrees to polish four first-layer crown faces towards the waist direction, and leaving the waist 3, wherein the height (h) of the waist 3 accounts for 10-20% of the height (H) of the square body. The machining method has the advantages that the diamond yield can be increased by 10-20%, each diamond of about one karat can save material cost by about 3000-3500 yuan, and the method can also improve the light refraction effect of the princess cut diamond, improve the brightness and fire of the diamond, and allow the diamond to glisten.

Description

technical field [0001] The invention relates to a diamond processing method, in particular to a princess cut diamond processing method. Background technique [0002] Legend has it that the Belgian king specially created a unique and mysterious square diamond for the princess when his beloved daughter was married. "Princess cut diamonds" popular in continental Europe. [0003] The processing method of existing princess cut diamond generally comprises the following steps, [0004] (1) Cutting the desktop, that is, cutting out a basically square desktop on the diamond blank according to the design requirements; [0005] (2) Grinding the cube, grinding the four sides of the square towards the waist respectively, and grinding out the cube used to form the waist; [0006] (3) To process the bottom, use the four lower sides of the cube as the starting sides, and use a grinding angle of 54°-60° (the grinding angle refers to the angle between the bottom surface and the cross-secti...

AI Technical Summary

Problems solved by technology

Grinding in this way can make the polished princess-cut diamonds have beautiful light and fire. However, there are two shortcomings in the princess-cut diamonds polished in this way. One is that the largest size of the diamond cannot be retained. Weight and maximum diameter, the existing one-carat princess cut diamond needs to be polished with 1.4-1.5 carat rough diamonds; the second is when polishing 4 triangular faces on the bottom layer, between two adjacent triangular faces It is not easy to form the intersecting edge of the triangular face. In order to form the intersecting edge between two adjacent triangular faces, sometimes it is required to polish a larger triangular face. the weight of

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