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Robuta

https://www.gia.edu/gems-gemology/spring-2003-rare-gem-species-mogok-valley-smith
Poudretteite: A Rare Gem Species from the Mogok Valley | Gems & Gemology
The rare borosilicate poudretteite, a mineral that previously had been identified only as tiny crystals.
rare gempoudretteitespeciesmogokvalley