mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale to honey yellow; Luster: Vitreous to resinous; Crystal System: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale to honey yellow
Luster: Vitreous to resinous

Identified May 7, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 3 on Mohs scale; Color: Pale to honey yellow; Luster: Vitreous to resinous; Crystal System: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Forms through sedimentary precipitation in marine environments or through hydrothermal activity in veins. It is often found in limestone or marble deposits worldwide.

Uses & applications

Used as an acid neutralizer in chemical industries, a component in cement/mortar, and as a decorative stone or metaphysical crystal for collectors.

Geological facts

Calcite is famous for its double refraction property. Depending on its purity and irradiation, it can appear in almost every color of the rainbow. Yellow calcite specifically is often associated with the solar plexus chakra in holistic practices.

Field identification & locations

Can be identified in the field by its softness (can be scratched by a copper coin) and its vigorous effervescence (bubbling) when exposed to a weak acid like vinegar or diluted HCl.