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Helvite, Quartz


Helvite : Mn2+4Be3[S|(SiO4)3], Quartz : SiO2

Photo Copyright © SpiriferMinerals.com  - Creative Commons Attribution Licence - Some Rights Reserved
Locality: Krushev dol deposit, Krushev dol mine, Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria
Group of helvite crystals on quartz, size of specimen 6 cm, find from 2008.
Coll. "Spirifer" Geological Society.
Fot. J. Scovil.

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