Blue Apatite
Fluorapatite (Apatite Group) · Semi-Precious Gemstone / Collector Mineral
Crystal System
Hexagonal crystal system; typically occurs in hexagonal prisms or massive/granular forms when tumbled
Mineral Group
Phosphates; specifically the Apatite group
Chemical Formula
Ca5(PO4)3F with traces of Mn, Fe, or OH
Formation Process
Igneous processes in pegmatites and volcanic rocks, or hydrothermal veins and metamorphic environments
About This Crystal
This is a tumbled, translucent to opaque specimen with a deep teal to neon blue color. It exhibits a vitreous luster and contains numerous internal fractures, veining, and cloudy inclusions typical of the species.
Physical Characteristics
Color: Teal blue; Streak: White; Cleavage: Indistinct; Fracture: Conchoidal to uneven; Specific Gravity: 3.16-3.23; Fluorescence: Weak yellow to purple-blue under shortwave UV.
Optical Properties
Refractive Index: 1.63-1.64; Birefringence: 0.002-0.008 (Uniaxial negative); Pleochroism: Strong (blue to yellow-green depending on orientation).
Hardness & Durability
Origin Region
Madagascar (most likely for this color), Brazil, Mexico, and Myanmar
Hardness & Durability
Mohs Hardness: 5; Toughness: Poor/Brittle; Low durability for rings, better suited for earrings or pendants.
Care & Maintenance
Clean only with warm soapy water. Avoid ultrasonic and steam cleaners. Extremely sensitive to acids, heat, and impact. Store separately from harder stones like quartz.
Rarity & Value
Relatively common in lower grades; neon blue Madagascar varieties are highly sought after. Value is determined by color saturation and clarity. Price range: $2 to $15 per carat for polished stones.
Special Characteristics
Occasionally exhibits chatoyancy (cat's eye effect) but primarily noted for its intense blue-green coloration and internal crystalline 'crazing' or fracture patterns.
Lore & History
Named from the Greek 'apate' meaning 'to deceive' because it was often confused with other minerals like tourmaline. Traditionally associated with the Throat Chakra and used in lore to symbolize personal power and manifestation.