mineral
Honey calcite (orange calcite)
Calcite; calcium carbonate (CaCO₃)
AI-generated identification · may be incorrectTypically honey-yellow to orange, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The specimen appears rough and naturally cleaved, though exact identification would benefit from testing.
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Physical properties
Typically honey-yellow to orange, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The specimen appears rough and naturally cleaved, though exact identification would benefit from testing.
Formation & geological history
Forms in sedimentary limestone, hydrothermal veins, caves, and metamorphic marble; its orange color commonly results from iron or other trace impurities. Calcite deposits range from ancient to geologically recent.
Uses & applications
Used for cement, lime, aggregate, and chemical manufacture; transparent attractive pieces are collected or carved, but it is too soft for most jewelry. Value is generally modest unless unusually clear, large, or well crystallized.
Geological facts
Calcite effervesces strongly with dilute hydrochloric acid and shows birefringence—printed text may appear doubled through clear pieces. It is much softer than quartz and can be scratched by a steel knife.
Field identification & locations
Common worldwide, including Mexico, Brazil, the United States, Iceland, and China; identify by rhombohedral cleavage, low hardness, and acid reaction. Similar amber or resin will not show calcite cleavage or acid effervescence.
