mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

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

Hardness: 3 on Mohs scale
Color: Pale yellow to honey-orange
Luster: Vitreous to waxy

Identified March 25, 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 of metamorphic and igneous origin. Common in limestone caves as stalactites or stalagmites.

Uses & applications

Primary source of lime for cement and fertilizer; used as a decorative stone, in jewelry (faceted or cabochon), and as a metaphysical healing stone in collecting circles.

Geological facts

Calcite is unique for its property of double refraction; if you look through a clear crystal, images appear doubled. It is also the primary component of sea shells and pearls.

Field identification & locations

Identify in the field by its 3-way cleavage that looks like slanted boxes and its reaction to dilute hydrochloric acid (it will fizz). Found globally in places like Mexico, USA, and Brazil.