mineral

Rough Green Calcite

Calcite (Calcium Carbonate, CaCO3)

AI-generated identification · may be incorrect

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

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

Identified March 16, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through sedimentary processes, often precipitated from marine organisms or in hydrothermal veins and caves. Found in various geological ages ranging from Precambrian to recent Holocene deposits.

Uses & applications

Used primarily for metaphysical purposes, lapidary work (cabochons), as acid-neutralizing agents in industry, and as decorative architectural stone when in bulk form (marble/limestone).

Geological facts

Green calcite is known for its 'soapy' or 'waxy' texture when handled. It is highly reactive to cold dilute hydrochloric acid, which causes it to effervesce (fizz) immediately—a primary diagnostic test in geology.

Field identification & locations

Identify in the field by its rhombohedral cleavage fragments, softness (can be scratched by a copper coin), and light green hue. Commonly found in Mexico, Brazil, and the USA. Collectors look for vibrant saturation and translucent clarity.