mineral

Blue Apatite

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

Hardness: 5 on Mohs scale; Color: Neon blue to teal; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.16 to 3.22.

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

Identified April 9, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Neon blue to teal; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.16 to 3.22.

Formation & geological history

Forms primarily in igneous rocks such as pegmatites and metamorphic rocks like marble. It can also be found in sedimentary environments and can be millions of years old depending on the host rock formation.

Uses & applications

Main source of phosphorus for fertilizer; used as a gemstone in jewelry (though soft); also a collector's specimen and used in laser research.

Geological facts

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

Field identification & locations

Identify in the field by its hexagonal crystal habit and its hardness (it can be scratched by a steel knife). Commonly found in Brazil, Madagascar, Mexico, and Myanmar.