mineral

Honey calcite (yellow calcite)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically honey-yellow to amber with a pearly or vitreous luster, translucent zones, and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The rough, rounded shape appears naturally weathered or lightly polished.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Forms in sedimentary limestones, hydrothermal veins, caves, and carbon-rich metamorphic environments through precipitation or recrystallization of calcium carbonate. Calcite deposits range from ancient Precambrian formations to modern cave and spring deposits.

Uses & applications

Used to manufacture cement, lime, aggregate, and agricultural soil treatments; attractive transparent pieces are collected or carved, though this specimen is generally not jewelry-grade.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid and may show double refraction through clear areas. Yellow coloration commonly results from iron or organic inclusions.

Field identification & locations

Common worldwide, including Mexico, Brazil, the United States, Iceland, and China. Confirm with a hardness test against a copper coin or steel, rhombohedral cleavage, and acid reaction; avoid scratching valuable specimens.