Blue Apatite
Apatite-(CaF) · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Hexagonal system; typically forms prismatic crystals, tabular masses, or granular aggregates
Mineral Group
Phosphates, specifically the apatite supergroup
Chemical Formula
Ca5(PO4)3(F,Cl,OH)
Formation Process
Forms primarily through igneous processes in pegmatites, metamorphic rocks, and sedimentary deposits, crystallizing from mineral-rich fluids under varying temperatures and pressures
About This Crystal
The specimen is a polished, tumbled stone displaying a deep, rich peacock blue to teal coloration with internal fractures, translucency, and a vitreous to sub-resinous luster
Physical Characteristics
Color ranges from blue, green, yellow, to purple with a white streak; hardness is 5 on the Mohs scale; poor to indistinct cleavage; conchoidal to uneven fracture; specific gravity is approximately 3.1 to 3.2; brittle tenacity
Optical Properties
Uniaxial negative with low birefringence; doubly refractive with refractive indices around 1.632-1.667; weak to moderate pleochroism in colored varieties
Hardness & Durability
Origin Region
Notable sources include Madagascar, Brazil, Myanmar, Mexico, and India; found in igneous, metamorphic, and sedimentary environments
Hardness & Durability
Mohs hardness of 5, making it relatively soft and easily scratched; poor toughness with distinct cleavage makes it vulnerable to sharp impacts; generally unsuitable for daily wear jewelry like rings
Care & Maintenance
Clean gently with warm, soapy water and a soft cloth; avoid ultrasonic and steam cleaners, harsh chemicals, and prolonged exposure to direct sunlight and high heat
Rarity & Value
Common mineral group, but fine gem-quality blue specimens are uncommon; value is determined by color saturation, clarity, and size; polished stones are generally affordable, while high-clarity faceted gems command higher prices
Special Characteristics
May exhibit weak fluorescence under ultraviolet light; sometimes displays subtle chatoyancy in fibrous varieties
Lore & History
Associated traditionally with personal power, motivation, and humanitarian pursuits; linked to the Third Eye and Throat chakras in crystal healing traditions, though these are symbolic beliefs rather than scientifically proven claims