mineral
Banded Calcite (translucent variety)
Calcite (Calcium Carbonate, CaCO3)
Hardness: 3 on Mohs scale; Color: Pinkish-white with banding; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71
- Hardness
- 3 on Mohs scale
- Color
- Pinkish-white with banding
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 3 on Mohs scale; Color: Pinkish-white with banding; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71
Formation & geological history
Formed through chemical precipitation in sedimentary environments, often in caves or hot springs where calcium-rich water evaporates, leaving behind layered deposits. Geological ages vary significantly from recent to hundreds of millions of years.
Uses & applications
Primarily used for decorative purposes, lapidary arts like tumbling, and metaphysical collections. Pure calcite is used in manufacturing cement and as a soil neutralizer.
Geological facts
Calcite is one of the most common minerals on Earth and exhibits double refraction, where light entering the crystal is split into two rays. It reacts strongly (fizzes) when exposed to dilute hydrochloric acid.
Field identification & locations
Identify in the field by its softness (can be scratched by a copper penny or steel knife) and its distinct rhombohedral cleavage planes. Commonly found in limestone quarries or karst landscapes.
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