mineral
Green Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale. Color: Light to dark green. Luster: Vitreous to pearly. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral cleavage in three directions. Specific Gravity: 2.71.
- Hardness
- 3 on Mohs scale
- Color
- Light to dark green
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 3 on Mohs scale. Color: Light to dark green. Luster: Vitreous to pearly. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral cleavage in three directions. Specific Gravity: 2.71.
Formation & geological history
Formed in sedimentary, metamorphic, and igneous environments, commonly through the precipitation of calcium carbonate from water solutions in hydrothermal veins, caves, and hot springs.
Uses & applications
Used in ornamental carvings, tumbling, wire-wrapping, metaphysical practices, and as a mineral specimen for collectors.
Geological facts
Green calcite often exhibits strong fluorescence under ultraviolet light. Its green color is typically caused by trace amounts of chromium, iron, or inclusions of chlorite during crystal growth.
Field identification & locations
Easily identified by its characteristic rhombohedral cleavage and low hardness (scratched easily with a copper penny or knife). It also effervesces (fizzes) when tested with a weak acid like hydrochloric or acetic acid (vinegar). Found globally, with notable deposits in Mexico, Peru, and the USA.
