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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. |
| Photo ID: 218244 View Count: 109 | |
Helvite : Mn2+4Be3[S|(SiO4)3] | |
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Krushev dol deposit, Krushev dol mine, Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria Tetrahedral, very well defined Helvite (20 mm) with quartz. Collected in 2007. Photo Zh.Janakieva, collection of “Earth and Man” National Museum, Sofia During the study of the ore samples from Krushev dol, Madan district, Bulgaria (january 2007) kept in the “Earth and Man” National Museum, Sofia the existence of minerals helvite has been ... |
| Photo ID: 198985 View Count: 89 | |
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