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- Type: Chalcedony (cryptocrystalline quartz) with iron oxide inclusions
- Provides evidence of ancient plant life and evolution
- Luster: Vitreous (glassy)
5-6 (sodalite) and 6-7 (syenite) on the Mohs scale
featuring rich green color with striking natural banding
Calcite on Black Druzy Quartz wyoming - Type: Chalcedony (cryptocrystalline quartz)Size: 24. 5 x 8 x 15 cm Weight: 1. 7 Kg Location : China Product Description Natural mineral specimen featuring calcite crystals resting on a sparkling layer of black druzy quartz. The druzy surface forms when countless tiny quartz crystals grow together inside a cavity, creating a glittering base. Calcite, a calcium carbonate mineral, crystallizes later from mineral rich fluids, adding contrast in color and crystal shape. A dramatic and eye catching
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