Gem FAQS > Gemstone & Jewelry News & Updates (7 entries)
The lastest news from GIA and other reputable sources on gemstone enhancements.
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This antique pendant contains an approx- imately 7.5 ct lead-glass-filled ruby. Photo by Bilal Mahmood. ...
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Tanzanite and Other Gems Set With Colored Adhesive ...
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Intense Purplish Pink Synthetic Diamond, HPHT Grown and Treated Many ...
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Artificial Metallic Veining Enhances Manufactured Gem Materials The Carlsbad laboratory recently examined one purple ...
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This Very Light pink heart-shaped diamond was submitted to the lab with a coating that gave it a Fancy pink color appearance, similar to the stone in the inset. Photo by ...
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This 6 ct lead-glass-filled ruby appears to have been damaged by immersion in jeweler’s pickling solution (top). A red substance present near the surface of the fractures may have been intended ...
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At top, in reflected light, the separation plane between crown and pavilion is obvious. Below, when immersed in water, the doublet displays different colors in the crown and pavilion, and an ...