gemstone

Pearl stud earrings

Pearl, primarily aragonite (CaCO₃) and conchiolin

AI-generated identification · may be incorrect

Creamy white, nacreous luster, typically near-spherical; Mohs hardness about 2.5–4.5. The image shows pearls mounted on metal earring posts; their internal structure cannot be determined visually.

Identified October 3, 2026More gemstone →

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Physical properties

Creamy white, nacreous luster, typically near-spherical; Mohs hardness about 2.5–4.5. The image shows pearls mounted on metal earring posts; their internal structure cannot be determined visually.

Formation & geological history

Pearls form when mollusks deposit layers of nacre around an irritant; these may be natural or cultured. Their age and whether they are freshwater or marine cannot be identified from the image.

Uses & applications

Used in jewelry and ornamentation; value depends on whether they are natural or cultured, plus size, luster, shape, surface quality, and provenance.

Geological facts

Pearls are biogenic gems rather than rocks, but are geological specimens under the stated criteria. Many modern pearls are cultured by placing a nucleus or tissue in a mollusk.

Field identification & locations

A photo alone cannot establish authenticity or origin; inspect nacre, surface, and drill holes, and seek gemological testing. Common sources include cultured-pearl farms in China, Japan, and the South Pacific.