mineral

Yellow calcite (likely honey/yellow calcite)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically yellow to honey-yellow, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.71. The specimen appears naturally fractured or roughly polished, with possible cloudy aragonite or matrix inclusions.

Identified September 12, 2026More mineral →

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Physical properties

Formation & geological history

Forms in limestone, hydrothermal veins, caves, and evaporite-related environments when calcium-rich fluids precipitate carbonate. Most examples are geologically young relative to bedrock, ranging from recent deposits to Paleozoic and younger formations.

Uses & applications

Used chiefly for decorative specimens, lapidary pieces, and mineral collecting; calcite is also important industrially as limestone, marble, cement feedstock, aggregate, and a source of lime.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid or vinegar, though vinegar may react slowly. It shows double refraction in clear pieces and has excellent cleavage that produces rhombohedral fragments.

Field identification & locations

Commonly found in Mexico, the United States, Brazil, China, and Iceland; identify it by its softness, cleavage, and acid reaction, while distinguishing yellow glass or resin by hardness and lack of cleavage.