mineral

Green Calcite

Calcite (Calcium Carbonate, CaCO3)

Hardness: 3 on Mohs scale (can be scratched by a copper coin). Color: Light pale green to seafoam green. Luster: Vitreous (glassy) to waxy. Crystal Structure: Trigonal/Hexagonal. Cleavage: Perfect rhombohedral in three directions. Specific Gravity: 2.71.

Hardness: 3 on Mohs scale (can be scratched by a copper coin)
Color: Light pale green to seafoam green
Luster: Vitreous (glassy) to waxy

Identified March 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes or hydrothermal activity. Often precipitates from calcium-rich solutions in caves, marine environments, or around hot springs. Can also be found in metamorphic marble deposits.

Uses & applications

Primarily used as a decorative material for carvings, ornamental stones, and semi-precious jewelry. Industrially, calcite is used in cement, soil treatment, and the chemical industry, though green specimens are usually reserved for collectors.

Geological facts

Green calcite is often associated with the 'heart chakra' in metaphysical circles. Its color is frequently caused by chlorite inclusions trapped during the crystallization process. It is highly reactive to cold dilute hydrochloric acid (it will fizz).

Field identification & locations

Identify in the field by its distinctive waxy feel, 3-directional cleavage, and softness (it cannot scratch glass). Commonly found in Mexico, Brazil, and the USA. Collectors should look for its translucent, 'soapy' appearance.