gemstone

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Hardness: 4.5-5.0 on Mohs scale; Color: sky blue, turquoise blue, white, and light green; Luster: Vitreous to silky; Crystal Structure: Triclinic (fibrous); Specific Gravity: 2.74-2.90.

Hardness: 4
Color: sky blue, turquoise blue, white, and light green
Luster: Vitreous to silky

Identified July 13, 2026More gemstone →

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Physical properties

Hardness: 4.5-5.0 on Mohs scale; Color: sky blue, turquoise blue, white, and light green; Luster: Vitreous to silky; Crystal Structure: Triclinic (fibrous); Specific Gravity: 2.74-2.90.

Formation & geological history

Larimar is a rare blue variety of Pectolite formed in cavities within basaltic lava through hydrothermal processes. It was formed during the Miocene epoch as hot, mineral-rich fluids circulated through volcanic vents.

Uses & applications

Primarily used in jewelry (cabochons, beads, pendants) and as a collector's gemstone due to its rarity and unique sea-like appearance.

Geological facts

Larimar is only found in one location in the entire world: the Filipinas Mine in Los Chupaderos, Dominican Republic. It was 'rediscovered' in 1974 by Miguel Méndez, who named it after his daughter Larissa and the Spanish word for sea (mar).

Field identification & locations

Identified by its distinctive 'Caribbean blue' color and white marbling that resembles sunlight dancing on water. Collectors should look for vibrant blue saturation and minimal brownish-red hematite inclusions.