Rock Identifier
Red coral beads (likely dyed or treated coral) (Corallium spp.; skeleton composed primarily of calcium carbonate (CaCO₃, calcite)) — gemstone
gemstone

Red coral beads (likely dyed or treated coral)

Corallium spp.; skeleton composed primarily of calcium carbonate (CaCO₃, calcite)

AI-generated identification · may be incorrect

Opaque, vivid red, matte-to-waxy surface; coral is about 3 on the Mohs scale and has no visible crystal structure in bead form. The image shows rounded carved beads, so natural coral cannot be confirmed from appearance alone.

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Physical properties

Opaque, vivid red, matte-to-waxy surface; coral is about 3 on the Mohs scale and has no visible crystal structure in bead form. The image shows rounded carved beads, so natural coral cannot be confirmed from appearance alone.

Formation & geological history

Precious coral grows as the calcium-carbonate skeleton of colonial marine organisms, commonly in deep waters; the beads were cut and polished from skeletal material. Coral deposits are geologically young and continue to form today.

Uses & applications

Used for jewelry and ornamental carving; high-quality natural coral is also collected. Red beads may instead be dyed bone, shell, resin, or imitation material.

Geological facts

Natural precious coral often shows fine growth lines and may have tiny pits or irregularities; uniform color can indicate treatment or imitation.

Field identification & locations

The image depicts red bead jewelry, not an identifiable raw rock; gemological testing is needed to verify coral. Precious coral is harvested in the Mediterranean and Indo-Pacific, among other regions.