gemstone
Larimar
Pectolite, NaCa2Si3O8(OH)
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
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Physical properties
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
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.
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