mineral

Honey calcite (orange/yellow calcite), likely a calcite-rich carbonate specimen

Calcite — calcium carbonate, CaCO₃

AI-generated identification · may be incorrect

Typically amber-yellow to orange, translucent to opaque, with vitreous to pearly luster; Mohs hardness 3, perfect rhombohedral cleavage, trigonal crystal system, and specific gravity about 2.71. The irregular rounded surface appears weathered or naturally botryoidal rather than crystalline.

Identified September 14, 2026More mineral →

Explore Honey calcite (orange/yellow calcite), likely a calcite-rich carbonate specimen 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 in sedimentary limestone, hydrothermal veins, caves, and carbonate-rich soils when calcium-bearing fluids precipitate calcite; its yellow color commonly reflects iron or other trace impurities. Calcite deposits range from ancient to modern, with no age determinable from the image.

Uses & applications

Used to produce cement, lime, agricultural soil amendments, and calcium carbonate fillers; attractive honey-colored pieces are collected or occasionally carved, though this specimen is not typically jewelry grade.

Geological facts

Calcite strongly effervesces with dilute hydrochloric acid or household vinegar, though vinegar may react slowly. It also shows birefringence: clear fragments can visibly double printed lines beneath them.

Field identification & locations

Common worldwide in limestone regions, including Mexico, the United States, Iceland, and China; identify it by softness, rhombohedral cleavage, and acid reaction. A definitive identification may require acid testing or hardness testing.