What is the optimization of gems

Today, Xiaobian introduces to friends what is gems optimization, then follow Xiaobian to look down!

First, gem optimization - filling treatment

Filling treatment is a special method of injecting colorless transparent or colored substances into the cracks, holes and pores of gemstones to improve the color and transparency of gemstones, to compensate for various defects, and to enhance the stability of porous gemstones. Colorless injection materials are usually selected from paraffin wax, vegetable oil, colorless plastic, glass, silica gel and resin glue, and colored injection is added in addition to the same filler as colorless injection, and a coloring agent is added. Identification of such injection filling treatment should be observed with reflected light under the arrogant mirror, pay attention to find the bubbles in the filling, the slight difference between the filling and the gloss of the jade stone, and the slight color outline of the crack (when filling) Evidence for colored substances). In addition, if the coloring agent is an organic dye, discoloration or fading will occur after a long period of time, and the injected gel will age over time, which is easier to identify.

Second, gem optimization - film treatment

Coatings, coatings and foils are often used for the surface treatment of gemstones. The purpose is to improve the color state and surface finish of the gemstones, enhance the gemstone gloss and cover the pits, cracks, scratches and other defects of the gemstone surface. Some coating materials (common paints, waxes or various resin glues mixed with dyes) are applied to the surface of the stone to improve its appearance. The coating is usually required to be uniform in thickness, between several micrometers and several hundred micrometers in thickness, and has a high surface finish. Coating is a relatively new surface treatment method. It adopts high-tech techniques such as precipitation technology, sputtering technology and crystal growth technology at the molecular or atomic level to lay multi-layer molecules or atomic films on the surface of gemstones. The thickness of the film is generally several nanometers to several hundred nanometers, and the film is transparent. It can be colored as needed, so the coated gemstone not only improves the gloss but also enhances the gemstone.

The foil is usually attached with a sheet of metal or organic foil on the bottom surface of the stone, and then closed into a mosaic.

Third, gem optimization - radiation treatment

Radiation treatment refers to irradiating a gemstone with atomic particles or radioactive substances to cause defects in the crystal structure, thereby changing the color center or generating a color center to change the color of the gemstone.

For radiation-treated gemstones, domestic and foreign regulations are required to attenuate residual radioactivity below safe values ​​for processing and sales.

Fourth, gem optimization - laser drilling

Certain gemstones containing dark inclusions affect sales due to obstructive viewing. Laser technology can be used to drill holes from the least visible part of the surface of the gemstone or to the nearest point of the inclusion. The laser beam is used to melt the inclusions or rinse the inclusions with hydrofluoric acid. After laser drilling, the holes are filled with high refractive index material. Diamonds with a low clarity grade are treated with this method to increase their clarity level.

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