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Any traditional process, other than cutting and polishing that improves the appearance or durability of a gemstone, is called “enhancement.” Nearly all gemstones are enhanced in one way or another, including those studded in fine jewelry. Angara fully discloses gemstone enhancements in accordance with the FTC guidelines and makes every effort to use only those stones that have been enhanced in accordance with AGTA rules. Learn more about common enhancement methods below:

1. Oil, wax and resin
Over two thousand years ago, emerald merchants realized that they could improve the clarity by soaking the stones in oil. Today, oils, waxes and resins are used to fill cracks and enhance the overall clarity and beauty. Common for: emeralds, opal and ruby (occasionally)
2. Heat Treatment
For centuries, it has been known that heat treatment can improve clarity and enhance the color of gemstones. The American Gem Trade Association (AGTA) accepts heat treatment as a standard finishing process for many colored gemstones. Common for: amethyst, aquamarine, citrine, ruby, sapphire, tanzanite and pink topaz
3. Bleaching and dyeing
The application of chemicals, heat or visible radiations, to lighten a stone’s color is known as “bleaching.” Dyeing is the process where the color of the stone changes. Common for: pearl
4. Irradiation
Irradiation often follows heat treatment as a means to enhance or create a gem’s color. It is a permanent process that consists of applying alpha, beta or gamma rays to the gemstone. Common for: black and colored diamond, blue topaz and citrine
5. Laser-treatment
Usually associated with diamonds, laser treatment alters the stone’s inclusions by the application of lasers and chemicals processes. Common for: diamonds
6. Diffusion
Artificial color or asterism produced by a combination of chemicals at high temperatures. According to FTC guidelines, gemstones chemically colored by diffusion need to be clearly noted.

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Author : Ankit Daga