mineral

Green Calcite

Calcite (Calcium Carbonate, CaCO3)

AI-generated identification · may be incorrect

Hardness 3 on the Mohs scale, vitreous to pearly or waxy luster, trigonal crystal system, perfect rhombohedral cleavage, specific gravity ~2.71. Displays varying shades of seafoam to pistachio green with translucent to opaque crystalline fractures.

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary precipitation in carbonate-rich marine or cave environments, or via hydrothermal veins carrying calcium- and bicarbonate-rich solutions where trace mineral inclusions (like chlorite or copper salts) impart the green coloration.

Uses & applications

Popular for decorative carvings (such as polished eggs, spheres, and figurines), ornamental polished stones, lapidary art, and widely sought after in metaphysical crystal collections.

Geological facts

Green calcite reacts vigorously with dilute hydrochloric acid by effervescing. The vivid green hue is typically caused by microscopic inclusions of chlorite trapped within the calcite matrix during crystallization.

Field identification & locations

Identifiable by its softness (easily scratched by a copper penny or steel nail), strong rhombohedral cleavage cracks visible under light, and cool, waxy-smooth feel when polished. Major deposits are found in Mexico, Pakistan, and Brazil.