mineral

Honey calcite crystal

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Translucent pale honey-yellow crystal with vitreous to pearly luster; Mohs hardness 3, rhombohedral crystal structure, perfect rhombohedral cleavage, and specific gravity about 2.71. The specimen appears naturally cleaved or broken rather than polished.

Identified September 20, 2026More mineral →

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Physical properties

Formation & geological history

Calcite precipitates from groundwater, hydrothermal fluids, caves, and sedimentary environments, commonly forming in veins and limestone cavities. Its exact geological age cannot be determined from the photograph.

Uses & applications

Used in cement, lime, aggregate, soil treatment, and chemical industries; transparent honey calcite is collected as a mineral specimen, though it is too soft for most jewelry.

Geological facts

Calcite strongly effervesces with dilute hydrochloric acid or vinegar, though vinegar may react slowly. It commonly shows birefringence: printed text viewed through a clear fragment can appear doubled.

Field identification & locations

Identify by its softness, rhombohedral cleavage, pale yellow color, and acid reaction; common worldwide, including limestone regions, Mexico, Iceland, the United States, and Europe. Avoid scratching or prolonged moisture/acid exposure.