mineral

Green Calcite

Calcium Carbonate (CaCO3)

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

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

Identified June 20, 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/Rhombohedral; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary processes or hydrothermal activity where calcium-rich solutions precipitate in veins or cavities. It is often found in large massive forms rather than distinct crystals.

Uses & applications

Used primarily as a decorative stone, in lapidary work for cabochons or carvings, and as a popular specimen for metaphysical collectors.

Geological facts

Calcite is one of the most common minerals on Earth, but the green variety gets its unique hue from chlorite or other mineral inclusions trapped during formation. It will effervesce (fizz) if a drop of cold dilute hydrochloric acid is applied.

Field identification & locations

Identify in the field by its softness (it can be scratched by a copper penny) and its characteristic rhombohedral cleavage. Commonly found in Mexico, Brazil, and the USA.