Larimar
Pectolite var. Larimar · Semi-Precious Gemstone / Decorative Stone
Crystal System
Triclinic, typically forms in radiating or fibrous masses
Mineral Group
Silicates, specific subgroup Inosilicates
Chemical Formula
NaCa2Si3O8(OH) with Cu substituting for Ca
Formation Process
Hydrothermal formation where hot fluids rich in elements crystallized within cavities in volcanic rocks
About This Crystal
An opaque to translucent tumbled stone exhibiting a distinct mottled pattern of light and dark sky-blue shades intermixed with white crystalline streaks, resembling sunlight reflecting on Caribbean water
Physical Characteristics
Color ranges from white, light blue, to deep volcanic blue; white streak; perfect cleavage in two directions; uneven to splintery fracture; specific gravity around 2.74 to 2.88; brittle tenacity; vitreous to silky luster
Optical Properties
Biaxial (+) with refractive indices ranging from 1.594 to 1.625; low to moderate birefringence; shows subtle chatoyancy in fine fibrous specimens
Hardness & Durability
Origin Region
Barahona province in the Dominican Republic; found in volcanic cavities and basaltic flows
Hardness & Durability
Mohs hardness of 4.5 to 5, making it relatively soft; poor toughness due to perfect cleavage; sensitive to scratching and prolonged exposure to direct sunlight which can cause fading
Care & Maintenance
Clean gently with warm soapy water and a soft cloth; avoid ultrasonic cleaners, harsh chemicals, prolonged soaking, and direct sunlight to prevent fading
Rarity & Value
Rare, as it is exclusively found in one location in the Dominican Republic; value depends on intense blue color, contrast, and lack of dark matrix inclusions
Special Characteristics
Distinctive wave-like patterns and unique ocean-blue coloration caused by copper substitution in the calcium pectolite structure
Lore & History
Discovered locally in 1974 and named by Miguel Méndez after his daughter Larissa and the Spanish word for sea (mar); widely associated in modern metaphysical practices with tranquility, emotional healing, and the throat chakra, though these remain traditional beliefs without scientific backing