mineral

Blue Apatite

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

AI-generated identification · may be incorrect

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

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

Identified March 7, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in igneous rocks (pegmatites), metamorphic rocks (skarns), and occasionally sedimentary deposits. It is the most common phosphate mineral and can be found in rocks dating back over a billion years.

Uses & applications

A major source of phosphorus for chemical fertilizers. Used sparingly in jewelry as cabochons or faceted stones, though its softness limits its use. Highly popular as a display mineral for collectors.

Geological facts

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

Field identification & locations

Identify in the field by its distinct teal-blue color and hexagonal crystal habits. It can be scratched by a steel knife but not by a copper penny. Commonly found in Madagascar, Brazil, Mexico, and Myanmar.