mineral

Honey calcite (rough fragment)

Calcite, CaCO₃

AI-generated identification · may be incorrect

Pale honey-yellow to tan, translucent, with a vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.7. The photo alone cannot confirm the identification; similar-looking minerals include feldspar and gypsum.

Identified September 28, 2026More mineral →

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Physical properties

Formation & geological history

Forms in limestone and marble, hydrothermal veins, and sedimentary cavities, often precipitating from calcium-rich water. Calcite occurs in rocks of many ages; the specimen’s age and source cannot be determined from the image.

Uses & applications

Used in cement, lime, and industrial fillers; attractive honey-colored pieces are collected or occasionally cut for decorative objects, though calcite is soft for jewelry.

Geological facts

Calcite fizzes in dilute hydrochloric acid and shows strong double refraction in clear crystals.

Field identification & locations

Look for rhombohedral cleavage and test scratchability (a copper coin can scratch calcite); acid reaction is a useful confirmation. Calcite is widespread worldwide in limestone regions and caves.