Blue Apatite
Fluorapatite · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Hexagonal, typically occurring as prismatic crystals or massive forms, though this specimen has been cut and polished into a six-sided generator tower.
Mineral Group
Phosphates (specifically part of the apatite group)
Chemical Formula
Ca5(PO4)3(F,Cl,OH)
Formation Process
Igneous, metamorphic, and hydrothermal processes. Apatite commonly crystallizes out of cooling magmas as an accessory mineral or forms in pegmatites and hydrothermal veins under moderate to high temperatures.
About This Crystal
This specimen is a carved and polished tower featuring a rich, deep teal to blue-green color with mottled darker matrix inclusions and a vitreous to sub-resinous luster. The transparency is translucent to opaque due to internal structural fracturing and inclusions, displaying subtle natural color zoning.
Physical Characteristics
Color ranges from blue, teal, to green with a white streak. Cleavage is poor in one direction (basal). Fracture is conchoidal to uneven. Specific gravity is approximately 3.1 to 3.2. Tenacity is brittle.
Optical Properties
Uniaxial negative with low birefringence (0.001 to 0.005). Refractive index ranges from 1.630 to 1.667. Exhibits weak to moderate pleochroism in colored varieties.
Hardness & Durability
Origin Region
Notable sources include Madagascar, Brazil, Myanmar, Mexico, and India. It typically forms in pegmatites, metamorphic rocks, and igneous veins.
Hardness & Durability
Mohs hardness of 5, making it relatively soft and easily scratched by quartz or steel. It has poor toughness and distinct cleavage, meaning it requires careful handling and is not recommended for daily-wear rings without protective settings.
Care & Maintenance
Clean gently using warm, soapy water and a soft cloth. Never use ultrasonic or steam cleaners, as the vibrations and thermal shock can fracture the stone. Avoid exposure to harsh acids, sudden temperature changes, and prolonged direct sunlight.
Rarity & Value
Common to uncommon as a mineral, but fine gem-quality blue material is moderately rare. Value is determined by color saturation, clarity, and size. Most polished towers are moderately priced and typically untreated.
Special Characteristics
Often exhibits weak to moderate fluorescence under UV light, varying from yellow to greenish-blue depending on the specific trace impurities present.
Lore & History
Historically, the name apatite comes from the Greek word 'apatein', meaning 'to deceive', because it was frequently mistaken for other minerals like topaz, tourmaline, or aquamarine. In crystal healing lore, blue apatite is traditionally associated with the third eye and throat chakras, believed to stimulate personal growth, motivation, and psychic attunement, though these are cultural traditions and not scientific facts.