mineral
Blue Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
AI-generated identification · may be incorrectHardness of 5 on the Mohs scale, vibrant blue to teal color, vitreous to sub-resinous luster, hexagonal crystal system, and poor cleavage.
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Physical properties
Hardness of 5 on the Mohs scale, vibrant blue to teal color, vitreous to sub-resinous luster, hexagonal crystal system, and poor cleavage.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments, primarily through hydrothermal processes and pegmatitic crystallization.
Uses & applications
Used mainly as a gemstone when faceted, in mineral collections, and as a primary source of phosphorus for fertilizers.
Geological facts
Apatite is the defining mineral for a hardness of 5 on the Mohs hardness scale. It is also the most abundant phosphate mineral on Earth.
Field identification & locations
Identified by its distinct blue color, prismatic crystal habit, and a Mohs hardness of 5 which can be scratched by a knife. Found commonly in Madagascar, Brazil, and Mexico.
