mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Hardness of 3 on the Mohs scale, yellow to golden-brown color, vitreous to pearly luster, trigonal crystal system, perfect rhombohedral cleavage, specific gravity of approximately 2.71.

Identified August 3, 2026More mineral →

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Physical properties

Hardness of 3 on the Mohs scale, yellow to golden-brown color, vitreous to pearly luster, trigonal crystal system, perfect rhombohedral cleavage, specific gravity of approximately 2.71.

Formation & geological history

Formed in sedimentary, metamorphic, and igneous environments through precipitation from calcium-rich water solutions, hydrothermal veins, and biological accumulations over millions of years.

Uses & applications

Used in optical applications, construction materials, cement manufacturing, soil conditioning, and as a popular mineral specimen for collectors and crystal healing.

Geological facts

Calcite exhibits strong double refraction (birefringence), meaning light passing through it splits into two separate rays, creating a doubled image.

Field identification & locations

Easily identified by its characteristic rhombohedral cleavage and effervescence (fizzing) when exposed to weak acids like dilute hydrochloric acid. Commonly found worldwide, especially in limestone and marble quarries.