Apatite
Fluorapatite (Apatite Group) · Collector Mineral / Semi-Precious Gemstone
Crystal System
Hexagonal; usually occurs in prismatic crystals, although this specimen shows a massive, granular, or massive-crystalline habit.
Mineral Group
Phosphates
Chemical Formula
Ca5(PO4)3F (often containing traces of Cl, OH, and Mn for color)
Formation Process
Primarily magmatic crystallization in pegmatites and igneous rocks, but also found in hydrothermal veins and metamorphic rocks.
About This Crystal
A translucent to opaque specimen displaying a vibrant teal or 'neon' blue-green color. It has a vitreous (glassy) to greasy luster and a granular, somewhat fractured surface texture with some matrix inclusions.
Physical Characteristics
Color: Teal/Blue-green; Streak: White; Cleavage: Poor; Fracture: Conchoidal to uneven; Specific Gravity: 3.1–3.2; Fluorescence: Often yellow or blue under UV light.
Optical Properties
Uniaxial (-); Refractive Index: 1.63 - 1.64; Birefringence: 0.002-0.008; Pleochroism: Strongly dichroic (blue to colorless/yellowish).
Hardness & Durability
Origin Region
Madagascar is the primary source for this 'neon' blue-green variety. Other sources include Brazil, Mexico, and Myanmar.
Hardness & Durability
Mohs Hardness: 5 (Defining mineral for 5). It is brittle and sensitive to heat and pressure, making it fragile for ring jewelry.
Care & Maintenance
Avoid ultrasonic and steam cleaners. Clean with warm soapy water and a soft cloth. Store away from harder stones like quartz or sapphire to prevent scratching.
Rarity & Value
Common as a mineral, but gem-quality blue 'neon' material is uncommon. Value is based on color intensity; heat treatment is common to enhance the blue hue.
Special Characteristics
Highly sensitive to acids; some specimens exhibit chatoyancy (cat's eye effect) when polished, though not visible in this rough form.
Lore & History
Historically named from the Greek word 'apatein' (to deceive) because it was often confused with other minerals like tourmaline. Metaphysically associated with the throat chakra and believed to enhance communication and personal power.