gemstone
Pearl (Imitation / Cultured Pearl)
Calcium carbonate (CaCO3) with conchiolin (or synthetic glass/plastic imitation)
AI-generated identification · may be incorrectHardness of 2.5–4.5 on the Mohs scale, pearlescent to metallic luster, pinkish-bronze color, and smooth spherical shape.
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Physical properties
Hardness of 2.5–4.5 on the Mohs scale, pearlescent to metallic luster, pinkish-bronze color, and smooth spherical shape.
Formation & geological history
Formed biologically by mollusks through concentric deposition of nacre, or synthetically coated onto glass or plastic beads.
Uses & applications
Predominantly strung into beaded bracelets, necklaces, and used widely in decorative fine and costume jewelry.
Geological facts
Natural pearls are among the few gems created by living organisms rather than geological processes beneath the Earth.
Field identification & locations
Real pearls feel slightly gritty when rubbed gently against natural teeth, whereas synthetic imitations feel perfectly smooth.
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