Blue Apatite
Fluorapatite (Apatite Group) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Hexagonal; typically occurs in prismatic crystals, massive, or granular habits.
Mineral Group
Phosphates
Chemical Formula
Ca5(PO4)3F with traces of Chlorine (Cl) and Hydroxyl (OH)
Formation Process
Primarily forms through magmatic crystallization in pegmatites or hydrothermal veins; also found in metamorphic rocks.
About This Crystal
Vibrant neon-blue to teal-blue color; translucent to nearly opaque; exhibits a vitreous to sub-glassy luster with some internal fracturing.
Physical Characteristics
Color is blue/teal with a white streak; possesses poor cleavage in one direction; conchoidal to uneven fracture; specific gravity 3.1–3.2; may show yellow or blue fluorescence under UV light.
Optical Properties
Uniaxial negative; refractive index 1.63–1.64; low birefringence; strong pleochroism in deeply colored specimens; occasionally shows chatoyancy (cat's eye).
Hardness & Durability
Origin Region
Madagascar, Brazil, Mexico, and Myanmar; typically found in igneous rocks and pegmatites.
Hardness & Durability
Mohs hardness of 5 (the index mineral for 5); brittle; low toughness; sensitive to heat and acids.
Care & Maintenance
Clean with warm soapy water only; avoid ultrasonic or steam cleaners; store away from harder stones like quartz or topaz to prevent scratching; avoid prolonged sunlight to prevent fading.
Rarity & Value
Common as a mineral, but gem-quality blue material is uncommon; value depends on color saturation and clarity; often relatively affordable compared to beryl.
Special Characteristics
Known for its 'neon' blue color that can mimic Paraiba Tourmaline; index mineral for the Mohs scale of hardness.
Lore & History
Historically used as a source of phosphorus for fertilizer; named from the Greek 'apate' (to deceive) because it was often mistaken for other minerals like aquamarine or fluorite. In traditional lore, it is associated with the throat chakra and believed to enhance communication and self-expression.