mineral

Larimar

Pectolite [NaCa2Si3O8(OH)] with copper substitution

AI-generated identification · may be incorrect

Hardness: 4.5-5 (Mohs scale), Color: Sky blue to sea blue with white cloud-like patterns, Luster: Vitreous to silky, Crystal structure: Triclinic, Cleavage: Perfect in two directions, Specific gravity: 2.7 to 2.9.

Hardness: 4

Identified May 17, 2026More mineral →

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Physical properties

Formation & geological history

Formed within volcanic pipes and cavities (basaltic gas bubbles) in the Dominican Republic. It occurs when hot mineral-rich fluids circulate through igneous host rock; the presence of copper causes the distinct blue coloration.

Uses & applications

Primarily used in the jewelry industry for cabochons, beads, and silver-set pendants. It is highly valued as a semi-precious gemstone and by mineral collectors for its rarity.

Geological facts

Larimar is also known as the 'Stefilia's Stone' or 'Dolphin Stone'. It was discovered in 1916 but rediscovered in 1974 by Miguel Méndez, who named it after his daughter Larissa and 'mar' (the Spanish word for sea).

Field identification & locations

Identify by its unique 'sea and sky' mottled blue and white pattern. It is found exclusively in the Bahoruco mountains of the Dominican Republic. Collectors should look for vibrant blues with distinct white webbing and minimal red or green staining.