gemstone
Precious Coral
Corallium rubrum
AI-generated identification · may be incorrectHardness of 3.5 on the Mohs scale, vibrant orange-red color, vitreous to dull luster, amorphous crystal structure, and effervesces in dilute hydrochloric acid.
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Physical properties
Hardness of 3.5 on the Mohs scale, vibrant orange-red color, vitreous to dull luster, amorphous crystal structure, and effervesces in dilute hydrochloric acid.
Formation & geological history
Formed by marine polyps secreting branching skeletons of calcium carbonate in deep, dark ocean waters over decades or centuries.
Uses & applications
Used extensively in fine jewelry, carved ornaments, and traditional amulets.
Geological facts
Precious coral has been harvested for millennia, highly prized in ancient Mediterranean and Asian cultures for its supposed protective mystical properties.
Field identification & locations
Identified by its organic origin, characteristic porcelain-like luster when polished, and distinct natural surface flow lines or pinhole patterns.
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