gemstone
Red Coral
Corallium rubrum
AI-generated identification · may be incorrectHardness of 3.5 on the Mohs scale, deep red to pinkish-red color, vitreous to dull luster, organic calcium carbonate structure with no cleavage, and a specific gravity of 2.60-2.70.
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Physical properties
Hardness of 3.5 on the Mohs scale, deep red to pinkish-red color, vitreous to dull luster, organic calcium carbonate structure with no cleavage, and a specific gravity of 2.60-2.70.
Formation & geological history
Formed from the skeletal remains of marine coral polyps in colonies on rocky seabeds, typically developing in deep, dark waters over decades or centuries.
Uses & applications
Widely used in fine jewelry, carvings, and ornamental objects as a prized organic gemstone.
Geological facts
Precious red coral has been harvested and traded across the Mediterranean region and Asia since ancient times for decorative and amuletic purposes.
Field identification & locations
Identified by its characteristic vibrant red hue, organic origin, and reaction to dilute acid, commonly sourced from the Mediterranean Sea and the Pacific.
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