Larimar
Pectolite var. Larimar · Semi-Precious Gemstone / Rare Mineral
Crystal System
Triclinic; typically occurs in massive, fibrous, or radial aggregates rather than distinct crystals.
Mineral Group
Silicates (Inosilicates)
Chemical Formula
NaCa2Si3O8(OH) with traces of Copper (Cu)
Formation Process
Secondary hydrothermal process where copper-rich fluids fill cavities and vesicles within basaltic lavas.
About This Crystal
Opaque to translucent sky-blue, turquoise, and white stones with a characteristic 'volcanic' or 'sea-foam' marbled pattern. Displays a silky to vitreous luster.
Physical Characteristics
Color: Blue, blue-green, white; Streak: White; Cleavage: Perfect in two directions (though usually massive); Fracture: Uneven to subconchoidal; Specific Gravity: 2.74-2.90; Fluorescence: Sometimes weak pale yellow under LWUV.
Optical Properties
Refractive Index: 1.59-1.63; Birefringence: 0.032-0.038; Pleochroism: Weak; Optical Phenomenon: Chatoyancy sometimes visible in fibrous specimens.
Hardness & Durability
Origin Region
Exclusively found in the Filipinas Mine in Los Chupaderos, Barahona Province, Dominican Republic.
Hardness & Durability
Mohs Hardness: 4.5 to 5.0. Toughness is generally good in massive form but vulnerable to scratching and acids.
Care & Maintenance
Clean with warm soapy water only; avoid ultrasonics, steam, and harsh chemicals. Store away from direct sunlight as prolonged exposure can cause the blue color to fade.
Rarity & Value
Rare (single-source origin). Value depends on the intensity of the blue (deep 'volcanic blue' is most prized) and the presence of white 'spider web' patterns. Small tumbled chips are common, but high-grade slabs are expensive.
Special Characteristics
Exhibits a unique 'water-reflection' pattern resembling sunlight on shallow Caribbean water; contains copper which provides the distinct blue hue unlike typical white pectolite.
Lore & History
Rediscovered in 1974 by Miguel Méndez and Norman Rilling; named after Méndez's daughter Larissa and the Spanish word for sea (mar). Often called the 'Dolphin Stone' or 'Atlantis Stone' in metaphysical circles, associated with the throat chakra and tranquility.