mineral

Green Calcite

Calcium Carbonate (CaCO3)

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

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

Identified June 15, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes or precipitation from hydrothermal solutions in caves or veins. It often forms in marine environments where calcium ions and carbonate ions are abundant.

Uses & applications

Used in the production of cement and lime, as an acid neutralizer in the chemical industry, and as a popular decorative stone or healing crystal for collectors.

Geological facts

Green calcite is known for its 'acid-washed' or waxy feel. It is a carbonate mineral and will effervesce (fizz) vigorously if a drop of dilute hydrochloric acid is applied.

Field identification & locations

Identify in the field by its rhombohedral cleavage, softness (can be scratched by a copper coin), and the acid fizz test. Commonly found in Mexico, Brazil, and the USA.