mineral
Honey calcite (likely rough calcite crystal)
Calcite, calcium carbonate (CaCO₃)
AI-generated identification · may be incorrectPale honey-yellow to cream, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The irregular white internal planes and soft appearance are consistent with calcite, though image-only identification is tentative.
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Physical properties
Pale honey-yellow to cream, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The irregular white internal planes and soft appearance are consistent with calcite, though image-only identification is tentative.
Formation & geological history
Forms when calcium-rich groundwater precipitates carbonate in cavities, veins, caves, and sedimentary environments; many specimens are geologically young relative to their host rocks, ranging from recent deposits to hundreds of millions of years old.
Uses & applications
Used industrially for cement, lime, aggregate, glass, and chemical production; attractive transparent pieces are sold as collector specimens, but it is generally too soft for durable jewelry.
Geological facts
Calcite effervesces strongly with dilute hydrochloric acid or vinegar if freshly scratched, unlike quartz. It commonly exhibits double refraction and can fluoresce in some varieties.
Field identification & locations
Common worldwide, including Mexico, Iceland, the United States, and China. Confirm with a copper coin or steel pin scratch test, rhombohedral cleavage, and acid reaction; avoid damaging valuable specimens.
