mineral

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH)

Hardness: 5 on Mohs scale; Color: Intense neon blue to deep teal; Luster: Vitreous to sub-vitreous; Crystal structure: Hexagonal; Specific gravity: 3.16 to 3.22

Hardness: 5 on Mohs scale
Color: Intense neon blue to deep teal
Luster: Vitreous to sub-vitreous

Identified July 2, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Intense neon blue to deep teal; Luster: Vitreous to sub-vitreous; Crystal structure: Hexagonal; Specific gravity: 3.16 to 3.22

Formation & geological history

Forms in igneous rocks (pegmatites), metamorphic rocks, and occasionally in sedimentary environments through the accumulation of organic remains. Many gem-quality specimens are found in Madagascar and Brazil.

Uses & applications

Primarily used in mineral collecting and as a gemstone for jewelry (though its softness limits its use in rings). In industry, apatite is the primary source of phosphorus for fertilizers.

Geological facts

Apatite is the defining mineral for 5 on the Mohs hardness scale. The name is derived from the Greek word 'apatein', meaning 'to deceive', because it was often confused with other minerals like beryl or tourmaline.

Field identification & locations

Identified by its hexagonal crystal habit and its 5.0 hardness (it can be scratched by a steel knife). Look for its characteristic 'neon' blue hue which is quite distinct from blue sapphire or topaz.