Larimar
Pectolite var. Larimar · Semi-Precious Gemstone and Decorative Stone
Crystal System
Triclinic, typically found in massive, fibrous, or radiating aggregates
Mineral Group
Silicates, specifically Inosilicates
Chemical Formula
NaCa2Si3O8(OH)
Formation Process
Hydrothermal alteration within basic volcanic rocks (basalts) where hot, mineral-rich solutions precipitate pectolite in cavities and vugs
About This Crystal
A polished, tumbled smooth stone displaying a distinctive light turquoise to sea-green color with characteristic white to pale grey cloud-like mottling and webbing patterns, reminiscent of sunlight reflecting on Caribbean water; opaque to translucent with a waxy to silky luster
Physical Characteristics
Color ranges from white, light blue, green-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; non-magnetic
Optical Properties
Biaxial (+) with refractive indices ranging between 1.594 and 1.633; birefringence of 0.038; exhibits a distinct chatoyant or silky sheen in certain fibrous specimens, though mostly displays a mottled adularescence-like appearance due to internal structural scattering
Hardness & Durability
Origin Region
Barahona province in the Dominican Republic; formed in volcanic cavities
Hardness & Durability
Mohs hardness of 4.5 to 5, making it relatively soft and susceptible to scratching; moderate to low toughness due to cleavage; sensitive to acids and prolonged direct sunlight which can cause fading
Care & Maintenance
Clean gently with warm, soapy water and a soft cloth; avoid ultrasonic or steam cleaners, harsh chemicals, acids, and prolonged exposure to direct sunlight to preserve its color and polish; store separately from harder stones to avoid scratching
Rarity & Value
Rare and localized to a single deposit in the world; value is determined by vivid blue coloration, high translucency, and the presence of complex white patterning; treatments are uncommon, though some pieces may be stabilized or dyed
Special Characteristics
Famous for its unique ocean-wave patterns caused by the intergrowth of pectolite fibers and other trace minerals; unique geographic monopoly from the Dominican Republic
Lore & History
Discovered relatively recently in the 1970s, named by combining the name of the discoverer's daughter (Lissa) with the Spanish word for sea (mar); in modern crystal healing, it is associated with the throat chakra, representing tranquility, relaxation, emotional healing, and connection to the divine feminine or oceanic energies, though these are traditional beliefs rather than scientific claims