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GIA Facetware® is a free online service that allows you to access over 38.5 million diamond proportion settings from the GIA database so you can estimate the cut grade of a diamond.

世界各地 GIA 校友會分會相關資訊。

Learn how experts use GIA’s 7 Pearl Value Factors™ to determine the quality of Akoya, freshwater, South Sea, and Tahitian pearls.

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