mineral

Orange calcite (honey calcite)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically translucent orange to honey-brown, with a vitreous to pearly luster, rhombohedral cleavage, and trigonal crystal structure; Mohs hardness 3 and specific gravity about 2.71. The image appears to show cleavage and transparency characteristic of calcite.

Identified August 8, 2026More mineral →

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Physical properties

Formation & geological history

Forms when calcium-rich groundwater precipitates carbonate, commonly in hydrothermal veins, cavities, caves, and sedimentary limestone environments. Individual specimens may range from geologically recent to Paleozoic or older depending on the host rock.

Uses & applications

Used in cement, lime, aggregate, glass manufacture, and chemical processing; attractive transparent pieces are sold as display minerals, though they are too soft for most jewelry.

Geological facts

Calcite effervesces vigorously with dilute hydrochloric acid and exhibits strong double refraction—printed text may appear doubled through clear pieces. Orange coloration commonly results from iron or other trace impurities.

Field identification & locations

Common locations include Mexico, Brazil, the United States, Iceland, and China. Identify it by its low hardness, rhombohedral cleavage, acid reaction, and double refraction; avoid scratching or prolonged exposure to acids.