mineral

Orange calcite

Calcite (CaCO₃), likely honey/orange calcite

AI-generated identification · may be incorrect

Typically Mohs hardness 3, white to vivid orange coloration, vitreous to pearly luster, translucent areas, and prominent rhombohedral cleavage; the orange color commonly comes from iron or other impurities. The specimen appears rough and partly crystalline rather than polished.

Identified August 28, 2026More mineral →

Explore Orange calcite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms when calcium-carbonate-rich groundwater precipitates in cavities, veins, caves, or sedimentary environments; individual specimens may range from modern deposits to ancient Paleozoic–Mesozoic host rocks. Exact age and locality cannot be determined from the image.

Uses & applications

Used for ornamental objects, lapidary material, mineral collections, and occasionally as a source of calcium carbonate; its softness limits jewelry durability. It is not generally used as a major construction stone in this form.

Geological facts

Calcite effervesces readily with dilute hydrochloric acid or strong vinegar, though testing can damage the specimen. Its rhombohedral cleavage and ability to scratch easily distinguish it from harder orange quartz varieties.

Field identification & locations

Common in Mexico, the United States, Canada, Brazil, and parts of Europe; identify it by its orange color, softness, cleavage, and acid reaction. Avoid confusing it with orange aragonite, gypsum, or chalcedony.