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Very harmonious ensemble of galena, blende, chalcopyrite and quartz, from the Madan mine in Bulgaria (year 90).
Stone dimensions: L: 78mm x W: 49mm x H: 55mm.
Weight with base: 384g.
| Galène |
Chemical composition: PbS (lead sulfide). Hardness: 2.5-2.75 on Mohs scale. Density: Approx. 7.4-7.6 g/cm³. |
| Chalcopyrite |
Chemical composition: CuFeS₂ (copper-iron sulfide). Hardness: 3.5-4 on the Mohs scale. Density: Approx. 4.1-4.3 g/cm³. |
