mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale to deep yellow or honey-gold; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale to deep yellow or honey-gold
Luster: Vitreous to waxy

Identified May 7, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale to deep yellow or honey-gold; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary processes, primarily from the precipitation of calcium carbonate from marine environments or hydrothermal veins. It occurs in a wide variety of geological ages and settings including limestone deposits and caves.

Uses & applications

Primarily used in the manufacture of cement and lime for construction. In crystal form, it is popular for ornamental use, metaphysical collections, and as a source of calcium in animal feed and soil treatment.

Geological facts

Calcite exhibits double refraction; if you look through a clear crystal, you will see a double image. Yellow calcite specifically is often associated with the solar plexus chakra in alternative healing practices.

Field identification & locations

Can be identified in the field by its 3-direction cleavage and its immediate effervescence (bubbling) when in contact with dilute hydrochloric acid. It is much softer than quartz, which it can superficially resemble.