mineral
Pearl
Biogenic CaCO3 (Aragonite)
AI-generated identification · may be incorrectHardness: 2.5-4.5 Mohs scale; Color: Creamy white with iridescent orient; Luster: Pearly; Composition: Aragonite (calcium carbonate) and conchiolin.
- Hardness
- 2
- Color
- Creamy white with iridescent orient
- Luster
- Pearly
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Physical properties
Hardness: 2.5-4.5 Mohs scale; Color: Creamy white with iridescent orient; Luster: Pearly; Composition: Aragonite (calcium carbonate) and conchiolin.
Formation & geological history
Biogenic formation within the soft tissue of a living shelled mollusk. Layers of nacre are deposited around an irritant over several years.
Uses & applications
Primarily used in high-end jewelry (necklaces, earrings) and luxury decorative arts.
Geological facts
The pearl is the only gemstone created by a living animal. Natural pearls are extremely rare, with most modern pearls being 'cultured' or farmed.
Field identification & locations
Identified by its unique pearly luster and smooth (or slightly gritty when rubbed on teeth) texture. Found worldwide in marine and freshwater mollusk habitats.
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