mineral

Honey calcite (optical calcite)

Calcite — calcium carbonate, CaCO₃

AI-generated identification · may be incorrect

Typically pale honey-yellow to amber, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.71. The specimen appears roughly cleaved or tumbled, with cloudy internal veils rather than crystal faces.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Forms from calcium-carbonate-rich groundwater, hydrothermal fluids, or sedimentary limestone environments; its exact geological age cannot be determined from the image. Yellow color commonly results from iron or other trace impurities.

Uses & applications

Used as a decorative and lapidary stone, ornamental carving material, and mineral specimen; calcite is also important industrially in cement, lime, glass, agriculture, and chemical production.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid or vinegar, though vinegar may react slowly. Clear optical calcite can show double refraction, while honey calcite is generally translucent and non-gem quality.

Field identification & locations

Identify by its softness, rhombohedral cleavage, translucent waxy-to-glassy appearance, and acid reaction; common localities include Mexico, Iceland, the United States, and China. Avoid hardness testing on polished surfaces because calcite scratches easily.