mineral

Honey calcite crystal fragment

Calcite (CaCO₃), likely honey or amber calcite

AI-generated identification · may be incorrect

Typically Mohs hardness 3, vitreous to pearly luster, transparent to translucent amber-brown color, and prominent rhombohedral cleavage; calcite is trigonal in crystal structure. The specimen appears naturally cleaved or partially polished, with internal striations and a pale cleavage face.

Identified August 28, 2026More mineral →

Explore Honey calcite crystal fragment 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-rich groundwater precipitates calcite in caves, veins, sedimentary beds, and hydrothermal environments; coloration commonly comes from iron or organic impurities. Calcite occurs from Precambrian to modern deposits, so age cannot be determined from the photograph.

Uses & applications

Used as a carbonate mineral in cement, lime, aggregates, soil treatment, and chemical manufacturing; transparent colored pieces are sold as decorative or educational specimens. It is generally inexpensive as a collector mineral.

Geological facts

Calcite shows strong birefringence: printed text viewed through a clear piece may appear doubled. It reacts readily with dilute hydrochloric acid or vinegar, producing bubbles, though testing may damage the specimen.

Field identification & locations

Common localities include Mexico, Iceland, the United States, Brazil, and China. Confirm with a hardness test against a copper coin or steel, rhombohedral cleavage, and acid reaction; avoid confusing it with harder quartz or fluorite.