Green Calcite

Physical Properties

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

Formation & Geological History

Formed through sedimentary processes, chemical precipitation, or in hydrothermal veins. It often forms from the accumulation of shell, coral, and algal debris in marine environments.

Uses & Applications

Primary source of lime for cement and mortar. Green varieties are popular for decorative carvings, lapidary use, and as metaphysical 'healing' stones.

Geological Facts

Calcite is one of the most common minerals on Earth. The green color in this specific variety is often due to chlorite or other mineral inclusions trapped during the crystallization process.

Field Identification & Locations

Can be identified in the field by its softness (can be scratched by a copper coin) and its vigorous reaction (fizzing) when exposed to dilute hydrochloric acid. Commonly found in Mexico, Brazil, and Africa.

Identified on: 5/13/2026

Mode: Standard