gemstone
Red Coral
Corallium rubrum
AI-generated identification · may be incorrectHardness of 3.5 on the Mohs scale, vibrant red to pink color, vitreous to dull luster, and an organic aragonite or calcite composition with no crystal structure.
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Physical properties
Hardness of 3.5 on the Mohs scale, vibrant red to pink color, vitreous to dull luster, and an organic aragonite or calcite composition with no crystal structure.
Formation & geological history
Formed by marine colonial invertebrates in tropical and subtropical ocean depths over centuries.
Uses & applications
Widely used in fine jewelry, carvings, and ornamental art.
Geological facts
Precious coral has been harvested for thousands of years and was historically valued as a protective amulet against evil spirits.
Field identification & locations
Identified by its organic origin, reactive effervescence with dilute hydrochloric acid, and natural branching growth patterns before being polished.
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