mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Hardness: 3 on Mohs scale; Color: Pale yellow to golden honey; Luster: Vitreous to resinous; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71

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

Identified April 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes, often precipitated from marine environments or within hydrothermal veins and limestone caves. It can be found in various geological ages ranging from ancient Paleozoic formations to modern cave deposits.

Uses & applications

Commonly used as a decorative stone, in jewelry (carvings and cabochons), for metaphysical collecting, and as a source of lime in agricultural and chemical industries.

Geological facts

Calcite exhibits a unique property called double refraction; if you place a clear piece over text, it will appear doubled. Yellow Calcite is often associated with self-confidence and mental clarity in the gemstone collecting community.

Field identification & locations

Identify in the field by its 3-way rhombohedral cleavage (looks like a slanting cube) and its reaction to weak hydrochloric acid (it will fizz/effervesce). Found globally in limestone quarries and caves.