mineral

Blue Apatite

Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))

AI-generated identification · may be incorrect

Hardness: 5 on Mohs scale; Color: Deep teal-blue to turquoise; Luster: Vitreous to sub-resinous; Crystal system: Hexagonal; Specific gravity: 3.16-3.22

Hardness: 5 on Mohs scale
Color: Deep teal-blue to turquoise
Luster: Vitreous to sub-resinous

Identified July 27, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Deep teal-blue to turquoise; Luster: Vitreous to sub-resinous; Crystal system: Hexagonal; Specific gravity: 3.16-3.22

Formation & geological history

Forms primarily in igneous rocks such as pegmatites, metamorphic rocks, and hydrothermally altered environments. Major deposits exist in Madagascar, Brazil, Mexico, and Russia.

Uses & applications

Used widely in ornamental carvings, polished tumbled stones, beads, and gemstone jewelry. Apatite group minerals are also a major industrial source of phosphorus for fertilizers.

Geological facts

Apatite is the defining mineral for hardness 5 on Mohs scale. Its name comes from the Greek word 'apate', meaning 'deceit', because it was historically often confused with other minerals like beryl, tourmaline, and topaz.

Field identification & locations

Identified by its rich blue-teal color, glass-like luster, and relative softness (scratched easily by a steel nail/knife). Commonly sold in tumbled and polished forms by lapidary vendors.