mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: honey yellow to pale orange; Luster: vitreous to pearly; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71

Hardness: 3 on Mohs scale
Color: honey yellow to pale orange
Luster: vitreous to pearly

Identified June 5, 2026More mineral →

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Physical properties

Formation & geological history

Forms in sedimentary environments through chemical precipitation from calcium-rich solutions, or in hydrothermal veins and hot springs. It is found in caves as stalactites and stalagmites.

Uses & applications

Used as an ornamental stone, a source of lime for cement, in the manufacture of fertilizers, and as a popular specimen for crystal collectors and metaphysical use.

Geological facts

Calcite is one of the most common minerals on Earth. Yellow variations often get their color from iron impurities. It exhibits double refraction, where light passing through it splits into two rays.

Field identification & locations

Identify by its soft surface (can be scratched by a copper coin) and its strong effervescence (bubbling) when in contact with dilute hydrochloric acid or vinegar. Often found in limestone and marble quarries.