mineral

Green Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale green to lime green; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale green to lime green
Luster: Vitreous to waxy

Identified April 3, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale green to lime green; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed in sedimentary environments through chemical precipitation from calcium-rich solutions, or in hydrothermal veins and metamorphic marbles. Found across various geological ages.

Uses & applications

Used primarily for metaphysical collecting, ornamental carvings, jewelry (rarely due to softness), and historically as an acid neutralizer or lime source.

Geological facts

Calcite is famous for its double refraction property. Green calcite specifically gets its color from chlorite or carbon-based inclusions trapped during the rapid growth of the crystals.

Field identification & locations

Identify by its 'soapy' or waxy feel when polished, and its reaction (bubbling/effervescence) when exposed to a drop of cold diluted hydrochloric acid. Commonly found in Mexico, Brazil, and Canada.