mineral

Green Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale green to lime green; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; 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

Identified April 28, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms primarily through sedimentary processes when calcium-rich waters precipitate, or in metamorphic environments such as marble. This specimen likely formed in a hydrothermal vein or a cave-like setting.

Uses & applications

Used in the manufacture of cement and lime, as optical filters, in the chemical industry, and highly valued as a decorative lapidary material or metaphysical healing stone.

Geological facts

Calcite is one of the most common minerals on Earth and is the primary constituent of limestone and marble. Green calcite gets its distinct color from chlorite or other mineral inclusions trapped during crystallization.

Field identification & locations

Identify in the field by its rhombohedral cleavage, its low hardness (can be scratched by a copper coin), and its strong effervescence (bubbling) when in contact with dilute hydrochloric acid.