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Showing posts with label Understanding Gemstones. Show all posts
Showing posts with label Understanding Gemstones. Show all posts

Thursday, April 15, 2021

Understanding Gemstones

The Swiss Gemmological Institute SSEF has launched a series of free-of-charge, online courses, entitled Understanding Gemstones. The gems currently covered are diamonds, emeralds, pearls, rubies and sapphires. 


Useful link: https://www.ssef.ch