Notes & TechniquesGems & Gemology, Fall 2016, Vol. 52, No. 3

A New Deposit of Gem-Quality Grandidierite in Madagascar (英语)

Delphine Bruyère, Claude Delor, Julien Raoul, Rufin Rakotondranaivo, Guillaume Wille, Nicolas Maubec, and Abdeltif Lahfid

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A New Deposit of Gem-Quality Grandidierite in Madagascar | Gems & Gemology