mineral

Polished honey calcite (likely)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Translucent amber-yellow material with pearly to vitreous luster and visible cleavage; calcite has Mohs hardness 3, trigonal crystal structure, and specific gravity about 2.71. The rounded shape appears polished or naturally water-worn, with possible surface coating or residue.

Identified August 28, 2026More mineral →

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Physical properties

Formation & geological history

Calcite forms in limestone, hydrothermal veins, caves, and sedimentary environments through precipitation of calcium carbonate. Its age cannot be determined from the image and depends on its host deposit.

Uses & applications

Used for cement, lime, aggregate, neutralizing acidic soils, and ornamental objects; attractive honey calcite is sold as a cabochon, carving, or specimen. It is softer and less durable than quartz gemstones.

Geological facts

A diagnostic test is vigorous fizzing with dilute hydrochloric acid; vinegar may produce a slower reaction. Calcite commonly shows excellent rhombohedral cleavage and strong birefringence under a magnifier.

Field identification & locations

Common worldwide, including Mexico, the United States, Iceland, and China. Confirm by hardness testing against a copper coin or steel blade and acid reaction; avoid scratching polished surfaces.