Blue Apatite
Fluorapatite (Apatite Group) · Semi-Precious Gemstone / Collector Mineral
Crystal System
Hexagonal system; often occurs in prismatic crystals, massive forms, or tumbled/smooth nodules as shown in the image.
Mineral Group
Phosphates (Apatite Group)
Chemical Formula
Ca5(PO4)3F with traces of Mn, Fe, or OH
Formation Process
Primarily magmatic in pegmatites or hydrothermal in veins; also occurs in metamorphic rocks through regional or contact metamorphism.
About This Crystal
Deep neon-blue to teal-blue coloration with a vitreous to greasy luster. The specimen appears translucent to opaque with visible internal fracturing and slight white or brownish mineral inclusions typical of raw/tumbled Madagascar material.
Physical Characteristics
Color: Teal-blue; Streak: White; Cleavage: Indistinct/Poor; Fracture: Conchoidal to uneven; Specific Gravity: 3.16-3.22; Fluorescence: Often yellow or blue under LWUV depending on trace elements.
Optical Properties
Refractive Index: 1.634-1.638; Birefringence: 0.002-0.008 (low); Pleochroism: Strong (blue to colorless/yellowish); Uniaxial Negative.
Hardness & Durability
Origin Region
Madagascar (most likely for this saturation), Brazil, Mexico, and Myanmar; typically found in pegmatites and metamorphic rocks.
Hardness & Durability
Mohs Hardness: 5 (Defining mineral for 5 on the scale); Brittle tenacity. It is relatively soft for jewelry and prone to scratches and heat shock.
Care & Maintenance
Avoid ultrasonic cleaners and steam cleaning. Use warm soapy water only. Extremely sensitive to acids and high heat. Store separately from harder stones like quartz to prevent scratching.
Rarity & Value
Common to Uncommon; Value is determined by color intensity (neon blues are most prized). Tumbled stones are affordable, while facet-grade material is more expensive.
Special Characteristics
Strong pleochroism and 'Neon' saturation levels in specific Madagascar varieties. May show slight cat's-eye chatoyancy if fibrous inclusions are present.
Lore & History
Historically confused with other minerals like tourmaline or beryl (derived from the Greek 'apate' meaning to deceive). Traditionally associated with the Throat Chakra, believed to help with communication and personal growth.