gemstone

Pearl jewelry

Pearl (biogenic calcium carbonate, primarily aragonite, CaCO₃)

AI-generated identification · may be incorrect

The spherical beads have a creamy golden color and pearly luster. Pearl hardness is about 2.5–4.5 Mohs; nacre consists of microscopic aragonite crystals in an organic matrix. The image does not establish whether these are natural, cultured, or imitation pearls.

Identified October 5, 2026More gemstone →

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Physical properties

Formation & geological history

Pearls form in mollusks as layers of nacre around an irritant; cultured pearls are produced by human-assisted nucleation. They are modern jewelry materials, not geological-age rocks.

Uses & applications

Used chiefly in jewelry and ornaments; pearls are valued for luster, shape, size, and color.

Geological facts

Pearls are biogenic gems rather than minerals in the strict sense, though their main component is a mineral.

Field identification & locations

Real pearls often show subtle surface irregularities and layered nacre; imitation beads may have a glass or plastic core. This photograph alone cannot confirm authenticity or identify the pearl type.