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Blue sapphire
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New Nigerian Source of Blue Sapphire

Vincent Pardieu, Supharart Sangsawong, Jonathan Muyal, Nicholas Sturman, August 22, 2014

A preliminary report on blue sapphires from a new deposit in Nigeria's Mambilla Plateau.

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The internal structures of natural pearls from the marine mollusk Pinctada maxima are the subject of the lead article in this issue. The scattered loose pearls on the cover are from Paspaley’s natural pearl collection, which includes one discovered in the 1970s at the Eighty Mile Beach fishing grounds
G&G Spring 2021 Edition
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