Rock Identifier
Red coral beads (likely dyed or treated coral) (Corallium spp. (precious coral; calcium-carbonate skeleton, chiefly calcite)) — gemstone
gemstone

Red coral beads (likely dyed or treated coral)

Corallium spp. (precious coral; calcium-carbonate skeleton, chiefly calcite)

AI-generated identification · may be incorrect

Red, opaque to slightly translucent, polished disc-shaped beads with a waxy-to-glassy luster; coral is typically Mohs 3–4, non-crystalline and relatively lightweight. The vivid, uniform color and dark patches may indicate treatment or imitation, which cannot be confirmed from the photo.

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Physical properties

Red, opaque to slightly translucent, polished disc-shaped beads with a waxy-to-glassy luster; coral is typically Mohs 3–4, non-crystalline and relatively lightweight. The vivid, uniform color and dark patches may indicate treatment or imitation, which cannot be confirmed from the photo.

Formation & geological history

Precious coral skeletons grow slowly in deep marine waters; their carbonate material accumulates over decades to centuries. The pictured beads are shaped and polished human-processed geological/biogenic material.

Uses & applications

Used in jewelry and collected as ornamental beads; coral is also studied as a marine habitat-former. Natural precious coral may be subject to trade restrictions.

Geological facts

Red precious coral is not a mineral crystal but a biogenic gemstone material. Red glass, resin, and dyed stone are common imitations.

Field identification & locations

Look for natural surface striations and small growth irregularities; a photo alone cannot distinguish coral from dyed stone or imitation. Precious coral occurs in the Mediterranean and Indo-Pacific.