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Galena, Sphalerite and Calcite (variety manganoan calcite)
Borieva Mine, Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria
73 mm × 57 mm × 27 mm
(Author: Firmo Espinar)
| Dimensions: | 1600 x 1200 |
| File size: | 294.42 kbytes |
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