mineral

Green Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale lime to emerald green; Luster: Vitreous to waxy/pearly; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71

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

Identified June 6, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through sedimentary processes, often precipitated from marine organisms or in hydrothermal veins and groundwater deposits. It can occur in varying ages from Precambrian to recent.

Uses & applications

Commonly used for ornamental purposes, carvings, lapidary work, and by mineral collectors. In industrial forms, calcite is used in cement, antacids, and soil treatment.

Geological facts

Green calcite is known for its 'waxy' texture when handled. It is a carbonate mineral and will vigorously effervesce (fizz) if a drop of weak hydrochloric acid or vinegar is applied to it.

Field identification & locations

Identify by its light green color, 3-directional rhombohedral cleavage, and low hardness. Often found in Mexico, Brazil, and Africa. Collectors should avoid cleaning with acidic solutions which will dissolve the stone.