mineral

Blue Apatite

Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))

Hardness: 5 on Mohs scale; Color: Electric blue to teal; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.1-3.2

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

Identified May 23, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Electric blue to teal; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.1-3.2

Formation & geological history

Forms primarily in igneous pegmatites, hydrothermal veins, and metamorphic rocks. It can also be found as a sedimentary mineral formed through organic accumulation in phosphate beds.

Uses & applications

Used as a source of phosphorus for fertilizer, as a minor gemstone in jewelry despite its softness, and as a popular specimen for crystal collectors.

Geological facts

Apatite is the mineral that makes up the tooth enamel and bones of mammals, including humans. It is often mistaken for other minerals like beryl or tourmaline due to its name, which comes from the Greek word apate, meaning deceit.

Field identification & locations

Identifiable by its 5 hardness (scratched by glass or a knife), hexagonal crystal shape, and characteristic sea-blue color. Common locations include Brazil, Madagascar, Mexico, and Myanmar.