gemstone

Red coral (coral beads)

Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)

AI-generated identification · may be incorrect

Opaque to slightly translucent red-orange beads with a polished, vitreous-to-waxy luster; calcite hardness is about 3 on the Mohs scale, and it has no obvious cleavage. The image alone cannot confirm whether the beads are natural coral or a lookalike material.

Identified October 8, 2026More gemstone →

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Physical properties

Formation & geological history

Natural coral skeletons grow slowly in deep marine waters and accumulate over time; coral species and growth ages vary. Beads are cut and polished from skeletal material.

Uses & applications

Used for jewelry and decorative objects; natural coral is also collected, while harvesting is restricted in many regions.

Geological facts

Coral is an animal-derived skeletal material, not a rock formed by conventional igneous, sedimentary, or metamorphic processes.

Field identification & locations

Natural coral often shows subtle growth structure and uneven color, but dyed stone, resin, and plastic imitations are common; testing or expert examination may be needed. Found in deep-water reefs, including the Mediterranean and parts of the Pacific.