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Rubis calcite . cristaux de corindon var rubis calcite Luc Yen Mine Luc Yen Yenbai Yen Bai Province Vietnam cristal mm crystals of corundum var ruby calcite Luc Yen Mine Luc Yen Yenbai Yen Bai Province Vietnam crystal mm Own Parent Gry Corundum Purple rubies Ruby Calcite Taken with Nikon D
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