mineral

Polished orange calcite sphere

Calcite (CaCO₃), likely honey/orange calcite

AI-generated identification · may be incorrect

Mohs hardness 3; orange to honey-brown color with cloudy white banding, vitreous to pearly luster, trigonal crystal structure, and perfect rhombohedral cleavage. The polished surface obscures cleavage but may show layered or fibrous internal zoning.

Identified September 12, 2026More mineral →

Explore Polished orange calcite sphere 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 mainly in sedimentary limestones, hydrothermal veins, and cave deposits when calcium-rich fluids precipitate carbonate; most specimens are geologically young to Paleozoic or Mesozoic in host rock. Exact locality cannot be determined from the image.

Uses & applications

Used for ornamental spheres, carvings, and decorative objects; calcite is also important in cement, lime, aggregate, soil treatment, and chemical industries. It is generally a low-value ornamental mineral rather than a jewelry stone.

Geological facts

Calcite strongly effervesces with dilute hydrochloric acid and commonly shows strong birefringence, producing doubled images through clear pieces. Orange coloration may result from iron or other trace impurities.

Field identification & locations

Identify by its soft surface, easily scratched by a steel knife, rhombohedral cleavage, and acid reaction; avoid prolonged water or acidic cleaners. Orange calcite occurs widely in Mexico, Brazil, Romania, and the United States.