mineral

Green Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale green to seafoam green; Luster: Vitreous to waxy/greasy; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

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

Identified July 9, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale green to seafoam green; Luster: Vitreous to waxy/greasy; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Formation & geological history

Formed through sedimentary processes or as a secondary mineral in igneous rocks, often through the precipitation of calcium-rich waters in hydrothermal environments or marine settings.

Uses & applications

Primarily used for ornamental purposes, metaphysical collecting, acid neutralization in soil, and as a calcium supplement in animal feed. Lightly used in craft jewelry.

Geological facts

Green calcite often has a distinctive 'waxy' feel when handled and can fluoresce under UV light. It is one of the most common minerals on Earth, but the specific green coloration is often due to chlorite inclusions trapped during crystallization.

Field identification & locations

Identify in the field by its rhombohedral cleavage, softness (can be scratched by a copper coin), and strong effervescence (bubbling) when exposed to cold dilute hydrochloric acid.