mineral

Pink Pearl

Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)

Hardness: 2.5–4.5; Color: Pink, iridescent; Luster: Pearly (orient); Crystal structure: Orthorhombic (microcrystalline aragonite); Cleavage: None; Specific Gravity: 2.60–2.85

Hardness: 2
Color: Pink, iridescent
Luster: Pearly (orient)

Identified May 1, 2026More mineral →

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Physical properties

Hardness: 2.5–4.5; Color: Pink, iridescent; Luster: Pearly (orient); Crystal structure: Orthorhombic (microcrystalline aragonite); Cleavage: None; Specific Gravity: 2.60–2.85

Formation & geological history

Biogenic formation within the soft tissue (mantle) of a living shelled mollusk, usually an oyster or mussel, as a defense against irritants. Freshwater varieties are common in rivers and lakes.

Uses & applications

Primarily used in high-end jewelry (necklaces, earrings, rings) and as a birthstone for June. Historically used in cosmetics and traditional medicine.

Geological facts

Pearls are the only gemstones created by living creatures. The pink color is often natural in freshwater pearls from China or saltwater Queen Conch pearls. Unlike other gems, they do not require cutting or polishing to reveal their beauty.

Field identification & locations

Identify by the 'tooth test' (rubbing against teeth feels gritty, whereas fakes feel smooth) and examining for orient/iridscence. Commonly produced via aquaculture in China, Japan, and French Polynesia.

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