mineral

Larimar (blue pectolite) bead bracelet

Pectolite, NaCa₂Si₃O₈(OH); blue color from copper-related impurities

AI-generated identification · may be incorrect

Typically Mohs 4.5–5; pale to vivid blue with white streaks or cloudlike patterns; silky to vitreous luster and triclinic crystals. The beads are polished, so hardness and cleavage are not directly visible; bracelet-grade stones are often stabilized or treated.

Identified October 4, 2026More mineral →

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Physical properties

Formation & geological history

Forms in cavities of volcanic rocks through hydrothermal processes. Gem-quality blue pectolite is principally associated with Miocene volcanic deposits in the Dominican Republic.

Uses & applications

Cut and polished into beads, cabochons, and jewelry; also collected as a distinctive gemstone. It is too soft for most heavy-wear industrial or construction uses.

Geological facts

Larimar is the trade name for the rare blue variety of pectolite, named after Larissa, the discoverer's daughter, and the Spanish word for sea (mar).

Field identification & locations

Identify by its blue-and-white, wave-like pattern and comparatively soft mineral; the pictured beads appear consistent with larimar, though a photo cannot confirm identity or treatments. Principal source is the Barahona region of the Dominican Republic.