mineral

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Hardness: 4.5–5.0 on Mohs scale; Color: Sky blue, turquoise, blue-green with white marbling; Luster: Vitreous to silky; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.7–2.9

Hardness: 4
Color: Sky blue, turquoise, blue-green with white marbling
Luster: Vitreous to silky

Identified March 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal activity where copper-rich fluids replaced calcium in cavities of basaltic lava (Andesite). It is roughly Miocene in age (approx. 20-30 million years old).

Uses & applications

Primarily used in jewelry (cabochons, beads, silver settings) and as a high-value collector's mineral specimen. Rare due to its limited location.

Geological facts

It is found in only one location in the world: the Filipinas Mine in Los Chupaderos, Dominican Republic. It was 'rediscovered' in 1974 and named after the discoverer's daughter, Larissa, and the Spanish word for sea, 'mar'.

Field identification & locations

Identify by its unique 'sea-foam' or 'cellular' white and blue patterns. In the field, look for volcanic basalt host rock; collectors should look for deep blue saturation which commands higher prices.