gemstone

Larimar

Pectolite, NaCa2Si3O8(OH)

AI-generated identification · may be incorrect

Hardness: 4.5-5; Color: light blue, white, sometimes with grayish or brownish inclusions; Luster: silky to vitreous; Crystal structure: triclinic (rarely forms distinct crystals, usually massive); Cleavage: perfect in two directions; Specific gravity: 2.74-2.88

Hardness: 4
Luster: silky to vitreous

Identified July 3, 2026More gemstone →

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Physical properties

Formation & geological history

Formed in cavities and veins of basaltic volcanic rocks from hydrothermal fluids. Found exclusively in the Dominican Republic.

Uses & applications

Primarily used as a gemstone in jewelry, often cabochon cut. Also polished for collectors and ornamental purposes.

Geological facts

Larimar was re-discovered in 1974 by a Peace Corps volunteer and a local Dominican. The name comes from 'Larissa' (the Dominican's daughter) and 'mar' (Spanish for sea).

Field identification & locations

Identified by its distinctive light blue to white mottled color pattern. Exclusively found in the Barahona province of the Dominican Republic. Care must be taken as it is somewhat soft for a gemstone.