mineral

Green Calcite

Calcium Carbonate (CaCO3)

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.

Hardness: 3 on Mohs scale
Color: Light to dark green
Luster: Vitreous to pearly

Identified August 2, 2026More mineral →

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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.