mineral
Orange calcite
Calcite, calcium carbonate (CaCO₃)
AI-generated identification · may be incorrectTypically Mohs hardness 3; orange to honey-brown with a vitreous to pearly luster and rhombohedral cleavage. Calcite crystallizes in the trigonal system; this specimen’s color and cleavage are consistent with calcite.
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Physical properties
Typically Mohs hardness 3; orange to honey-brown with a vitreous to pearly luster and rhombohedral cleavage. Calcite crystallizes in the trigonal system; this specimen’s color and cleavage are consistent with calcite.
Formation & geological history
Forms in sedimentary and hydrothermal settings, including limestone cavities and veins; calcite occurs from many geological ages. The specimen’s precise locality and age cannot be determined from the image.
Uses & applications
Used in cement, lime, and other industrial products; attractive orange material is collected or fashioned into ornaments, though its softness limits jewelry use.
Geological facts
Calcite effervesces in dilute acid and commonly shows strong double refraction in clear crystals.
Field identification & locations
Look for relatively soft material and distinctive rhombohedral cleavage; orange calcite occurs at localities worldwide, often in veins and cavities. The photo alone cannot confirm identification or provenance.
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