gemstone
Pearl
Calcium Carbonate (Aragonite/Calcite) and Conchiolin
AI-generated identification · may be incorrectMohs hardness 2.5-4.5, pearlescent luster, white to cream color, specific gravity 2.60-2.85.
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Physical properties
Mohs hardness 2.5-4.5, pearlescent luster, white to cream color, specific gravity 2.60-2.85.
Formation & geological history
Formed organically within the mantle of marine and freshwater mollusks as a defense against irritants.
Uses & applications
Extensively used in fine jewelry production, necklaces, earrings, and decorative ornaments.
Geological facts
Unlike mined gemstones, pearls require no cutting or polishing to reveal their natural iridescent beauty.
Field identification & locations
Identified by its characteristic organic luster and slight surface texture under magnification; cultured extensively in tropical waters.
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