[Event Report] We held an HGA Gem Identification Seminar in Yokohama | Practical identification techniques learned from approximately 150 gemstones

Today, we held an HGA Gem Identification Seminar in Kannai, Yokohama.In this seminar, we used approximately 150 gemstones as ...
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Gem Identification: Geology vs. Geography

Asapphire from Kashmir is worth more than one from Sri Lanka simply because of its locality. Exotic origins are part of the romance of gems. Throughout most of history there were only a few known ...