mineral

Larimar (Pectolite)

NaCa2Si3O8(OH)

Hardness: 4.5-5.0 on Mohs scale; Color: sky-blue, greenish-blue, white; Luster: vitreous to silky; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.7-2.9.

Hardness: 4
Color: sky-blue, greenish-blue, white
Luster: vitreous to silky

Identified July 4, 2026More mineral →

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Physical properties

Hardness: 4.5-5.0 on Mohs scale; Color: sky-blue, greenish-blue, white; Luster: vitreous to silky; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.7-2.9.

Formation & geological history

Formed through hydrothermal processes; specifically, it is a rare blue variety of pectolite that occurs in cavities within basaltic lavas. Found in the Dominican Republic, created during the Miocene Epoch.

Uses & applications

Primarily used as a gemstone for jewelry (beads, cabochons, pendants) and as a collector's specimen due to its rarity and unique aesthetic.

Geological facts

Larimar is found in only one location in the world: the Filipinas Mine in Los Checheses, Dominican Republic. It is often called the 'Dolphin Stone' or 'Atlantis Stone.'

Field identification & locations

Identify by its distinctive 'sea and sky' mottled blue and white patterns. In the field, look for volcanic basalt host rock. For collectors, higher intensity of blue and fewer reddish-brown (hematite) inclusions increase value.