gemstone
Pearl
Calcium carbonate (CaCO3) in the form of aragonite and calcite
AI-generated identification · may be incorrectHardness of 2.5-4.5 on the Mohs scale, pearlescent luster, typically white or cream in color, and composed of microscopic concentric crystal layers.
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Physical properties
Hardness of 2.5-4.5 on the Mohs scale, pearlescent luster, typically white or cream in color, and composed of microscopic concentric crystal layers.
Formation & geological history
Formed organically inside the soft tissue of living shelled mollusks as a defense mechanism against irritants.
Uses & applications
Widely used in fine jewelry, luxury accessories, and traditional ornamentation.
Geological facts
Unlike most gemstones, pearls require no cutting or polishing to reveal their natural beauty and luster.
Field identification & locations
Identified by its distinctive organic origin, warm touch, and characteristic iridescent sheen, commonly harvested in marine and freshwater environments worldwide.
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