mineral

Tumbled honey calcite

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Pale honey-yellow, translucent to opaque, with a vitreous-to-waxy luster; Mohs hardness 3, rhombohedral crystal structure, perfect rhombohedral cleavage, and specific gravity about 2.71. The smoothly rounded surface indicates tumbling and polishing.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Forms when calcium-rich groundwater precipitates carbonate in sedimentary veins, cavities, caves, and limestone deposits; specimens may range from ancient Paleozoic deposits to modern mineralization. Exact identification requires testing because similar tumbled stones include yellow aragonite or quartz.

Uses & applications

Commonly sold as a decorative and metaphysical stone; larger calcite is used in cement, lime, aggregate, optics, and chemical processing. It is generally too soft for durable jewelry.

Geological facts

Calcite strongly effervesces with dilute hydrochloric acid and shows birefringence, producing doubled text when placed over writing. Honey coloration commonly results from iron or other trace impurities.

Field identification & locations

Look for softness, rhombohedral cleavage, and acid reaction; it should scratch readily with a steel knife but not glass. Common sources include Mexico, Brazil, the United States, and China.