gemstone

Pearl strand

Nacreous pearl, primarily aragonite (CaCO₃) with conchiolin protein

AI-generated identification · may be incorrect

Mohs hardness about 2.5–4.5; rounded irregular bead shapes with pearly, iridescent luster and layered internal structure. Color is lavender-purple, likely naturally colored or treated freshwater cultured pearls; specific gravity about 2.60–2.85.

Identified August 17, 2026More gemstone →

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Physical properties

Formation & geological history

Pearls form when an irritant is enclosed by nacre inside a mollusk; these are most likely cultured freshwater pearls from mussels, commonly produced in China. The nacre forms over months to several years, not as an ancient geological deposit.

Uses & applications

Used primarily in jewelry and ornamental beadwork. Commercial value depends on nacre quality, surface blemishes, luster, shape, size, matching, and whether color is natural or dyed.

Geological facts

Pearl is an organic gemstone rather than a conventional rock or mineral specimen. Freshwater pearls commonly contain solid nacre, unlike many bead-nucleated saltwater cultured pearls.

Field identification & locations

Identify by its soft nacre, orient/pearlescent surface, irregular shapes, and fine layered growth; a loupe may reveal pits or growth texture. Scratch, flame, and tooth tests can damage pearls and should be avoided.