mineral
Honey calcite (rough calcite crystal)
Calcite, CaCO₃
AI-generated identification · may be incorrectPale honey-yellow, translucent to cloudy, with a vitreous to pearly luster and rhombohedral cleavage; Mohs hardness 3. The small rough piece shows no clearly visible crystal form, so identification is based on appearance alone.
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Physical properties
Pale honey-yellow, translucent to cloudy, with a vitreous to pearly luster and rhombohedral cleavage; Mohs hardness 3. The small rough piece shows no clearly visible crystal form, so identification is based on appearance alone.
Formation & geological history
Calcite forms in many settings, including limestone, hydrothermal veins, and caves; the image does not reveal its specific origin or age.
Uses & applications
Commonly collected and sometimes cut or polished for decorative objects; calcite is also an important raw material for cement and lime.
Geological facts
Calcite effervesces readily in dilute hydrochloric acid and exhibits strong double refraction in clear crystals.
Field identification & locations
Look for softness, rhombohedral cleavage, and a positive acid reaction; yellow color alone is not diagnostic. Calcite occurs worldwide in carbonate rocks and mineral veins.
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