Martin Steinbach: “An Overview of Asteriated Gems”
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Emmanuel Fritsch: “‘Boehmite Needles’ in Corundum Are Rose Channels”
46:48
Three Precious Gems: Rubies, Emeralds, Sapphires
19:39
All About Phenomenal Gemstones: Star Sapphire, Labradorite, More!
17:42
Heat Treating Montana Sapphire
14:38
A brief history of powerful gemstone amulets | V&A
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Unboxing $3,000,000 in Gemstones | Paraiba Tourmaline & More
7:42
Hold the Stars in Your Hands [Phenomenal Gemstones]
22:04