mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale yellow to honey gold; 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 yellow to honey gold
Luster: Vitreous to waxy

Identified June 13, 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

Forms in sedimentary environments through chemical precipitation or as a primary mineral in igneous and metamorphic rocks. It often forms through the cooling of hot mineral-rich solutions in veins.

Uses & applications

Used as a decorative stone, in crystal healing practices, as an abrasive, and historically as a source of lime for cement and mortar.

Geological facts

Calcite is one of the most common minerals on Earth and is the primary constituent of limestone and marble. It exhibits double refraction, where light passing through a clear piece is split into two rays.

Field identification & locations

Identify by its 'soapy' or waxy feel and its reaction (bubbling/effervescing) when a drop of weak acid like vinegar is applied. It can be easily scratched by a copper penny or steel knife.