gemstone

Pearl

Biogenic calcium carbonate; mainly aragonite (CaCO₃), sometimes calcite, in nacre

AI-generated identification · may be incorrect

Small rounded cream-white bead with pearly luster, likely a cultured freshwater pearl. Mohs hardness about 2.5–4.5; nacreous layered structure, no cleavage, specific gravity about 2.60–2.85. The surface appears smooth and reflective, with a possible drill hole or dimple.

Identified September 14, 2026More gemstone →

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At a glance

Common name: Pearl
Scientific name: Biogenic calcium carbonate; mainly aragonite (CaCO₃), sometimes calcite, in nacre
Category: gemstone
Identified: September 14, 2026
Method: Standard

AI Estimated Value

About $1–$20 for a common freshwater cultured pearl; $20–$200+ for high-quality cultured examples. Natural pearls can be worth hundreds to thousands, but require laboratory verification.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Formed by a mollusk depositing concentric nacre layers around an irritant; most jewelry pearls are cultured. Freshwater pearls commonly form in mussels, while marine pearls form in oysters. The image alone cannot establish age or species.

Uses & applications

Used primarily in jewelry and ornamentation. Value depends on luster, nacre quality, shape, size, surface blemishes, color, and whether it is natural, cultured, or imitation.

Geological facts

Pearls are biogenic gemstones rather than rocks in the strict petrological sense, but they qualify here as geological specimens. They should not be exposed to acids, perfumes, heat, or prolonged dryness.

Field identification & locations

The warm cream color and rounded form are consistent with a cultured pearl, but a bead of glass, plastic, or shell-coated material is also possible. Check for a drill hole, nacre layering, tooth feel (slightly gritty, not glassy), and X-ray testing for confirmation. Sabah’s region supports pearl aquaculture, but origin cannot be determined visually.