gemstone

Larimar

Pectolite (NaCa2Si3O8(OH))

AI-generated identification · may be incorrect

Hardness: 4.5 to 5 on the Mohs scale, Color: Distinctive mottled light blue, turquoise, green, and white, Luster: Vitreous to silky, Crystal System: Triclinic, Specific Gravity: 2.70 to 2.84

Hardness: 4

Identified July 28, 2026More gemstone →

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Physical properties

Hardness: 4.5 to 5 on the Mohs scale, Color: Distinctive mottled light blue, turquoise, green, and white, Luster: Vitreous to silky, Crystal System: Triclinic, Specific Gravity: 2.70 to 2.84

Formation & geological history

Formed in volcanic cavities and hydrothermal veins within basaltic lavas. The unique blue color is caused by the substitution of copper for calcium in the pectolite structure. It is found almost exclusively in the Dominican Republic.

Uses & applications

Used primarily in high-end jewelry, carvings, and as a collector's gemstone.

Geological facts

Larimar was discovered in 1974 by a local named Norman Rilling and a Peace Corps volunteer named Miguel Mendez. They named it by combining 'Larissa' (Mendez's daughter's name) with 'Mar' (the Spanish word for sea).

Field identification & locations

Easily identified by its unique wave-like patterns and oceanic blue colors resembling light shimmering through Caribbean water. Found exclusively in the Barahona province of the Dominican Republic.