Larimar
Pectolite var. Larimar · Semi-Precious Gemstone / Rare Collector Mineral
Crystal System
Triclinic; typically found in massive, microcrystalline, or fibrous habits.
Mineral Group
Silicates; Inosilicate (Chain Silicate) - Pectolite Group
Chemical Formula
NaCa2Si3O8(OH) with traces of Copper (Cu)
Formation Process
Hydrothermal; secondary mineral formed in cavities or vesicles of basaltic lavas (andesite) where copper-rich fluids interacted with petrified wood or other minerals.
About This Crystal
Translucent to opaque with a waxy to vitreous luster. This specimen is carved into a stylized figure, showing the signature sky-blue and white marbling. It exhibits a characteristic 'sea-foam' pattern with varying shades of cyan and white.
Physical Characteristics
Color is light blue, cyan, and white; streak is white; cleavage is perfect in two directions (though usually hidden in massive form); specific gravity is 2.7–2.9; non-magnetic; no significant fluorescence.
Optical Properties
Refractive index of approx. 1.59–1.63; biaxial positive; no significant pleochroism or dispersion; exhibits a soft chatoyancy in fibrous areas.
Hardness & Durability
Origin Region
Exclusive to the Filipinas Mine in Los Checheses, Barahona Province, Dominican Republic.
Hardness & Durability
Mohs hardness 4.5–5.0; relatively brittle with fair toughness; vulnerable to scratches from quartz and harder stones.
Care & Maintenance
Avoid ultrasonic cleaners and steam. Clean with warm, soapy water and a soft cloth. Keep away from sunlight for extended periods as the blue can fade; avoid acidic chemicals and perfume.
Rarity & Value
Rare (single-source gemstone); value is driven by color saturation (deeper blue is more expensive) and pattern; rarely treated, though imitation glass and dyed minerals exist.
Special Characteristics
Distinctive photosynthetic-like 'volcanic blue' coloring caused by copper substitution for calcium; often features dendrites or hematite inclusions.
Lore & History
First discovered in 1916 but 'rediscovered' and named in 1974 by Miguel Méndez (Larissa + Mar). Historically associated with the 'Lost Continent of Atlantis' and traditionally believed to promote calmness and clear communication through the throat chakra.