Description
Conversation with pioneer of growing HPHT Gem-Quality diamonds Dr. Boris Feigelson, USA, on “HPHT Grown Diamonds. Insider Story”.
- Date: November 14, 2020
- Length: 1h 24m
RECORDED Conversation with Pioneer of Growing HPHT Gem-Quality Diamonds Dr. Boris Feigelson from November 14, 2020
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