Posted on January 1, 2018 by John J. Bradshaw, GIA GG

INTRODUCTION Jeremejevite is a mineral species with the formula,  Al6B5O15(OH,F)3. It is pronounced by replacing the “J” with “Y” so phonetically, it would be “yeremeyevite.” It was first discovered in 1883 on Mt. Soktuj in East…

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