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![Gemological Institute of America - Official Site](https://www.iarticlesnet.com/pub/img/site/s_43.jpeg)
Gemological Institute of America - Official Site
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日期:2024-09-04
New Gems Added: Amethyst, Citrine, Lapis Lazuli, Moonstone Explore the science and lore of gems from across the globe. You’ll find history, a buyer’s guide, famous stones, quality factors, research, a map of localities and details about synthetics, treatm...看更多