mineral

Polished honey/pink calcite heart

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Translucent cream, honey-yellow, and pale pink bands with a vitreous to pearly luster; likely Mohs hardness 3, rhombohedral crystal structure, and perfect rhombohedral cleavage. The rounded heart is polished and shaped, obscuring natural crystal faces.

Identified September 4, 2026More mineral →

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Physical properties

Formation & geological history

Calcite forms in sedimentary limestones, hydrothermal veins, caves, and carbonate-rich cavities; its age depends on the deposit, commonly ranging from young cave deposits to Paleozoic or older rocks. The banding reflects changing impurities and growth conditions during precipitation.

Uses & applications

Used as an ornamental and lapidary stone, carving material, and collector specimen; calcite is also important industrially for cement, lime, aggregate, and chemical manufacture. It is generally unsuitable for durable jewelry because it scratches and dissolves in acids.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid and shows pronounced birefringence, producing doubled images through clear pieces. Honey calcite is often marketed as an attractive decorative variety rather than a formally distinct mineral species.

Field identification & locations

Identify it by its softness, translucent banding, rhombohedral cleavage, and acid reaction; avoid vinegar-based cleaning and prolonged moisture or abrasion. Common sources include Mexico, Brazil, the United States, and Madagascar.