mineral

Larimar

Pectolite (NaCa2Si3O8(OH))

Hardness: 4.5–5.0 on Mohs scale; Color: Sky blue, light blue, or teal with white marbling; Luster: Vitreous to silky; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 2.74–2.90.

Hardness: 4
Color: Sky blue, light blue, or teal with white marbling
Luster: Vitreous to silky

Identified April 2, 2026More mineral →

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Physical properties

Hardness: 4.5–5.0 on Mohs scale; Color: Sky blue, light blue, or teal with white marbling; Luster: Vitreous to silky; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 2.74–2.90.

Formation & geological history

Formed through hydrothermal activity where copper-rich fluids circulated through cavities in basaltic lavas. This occurred during the Miocene epoch in volcanic environments.

Uses & applications

Primarily used as a gemstone in jewelry (rings, pendants, and earrings), and as a high-value collector's mineral due to its rarity.

Geological facts

Larimar is also known as the 'Dolphin Stone' or 'Atlantis Stone.' It was discovered in 1916 but rediscovered in 1974 by Miguel Méndez, who named it by combining his daughter's name 'Larissa' with 'mar,' the Spanish word for sea.

Field identification & locations

Larimar is found only in the Dominican Republic. It can be identified in the field by its distinct blue and white needle-like (acicular) crystal patterns. Collectors should look for vibrant blue saturation and minimal green or red (iron) spotting.