mineral

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Hardness: 5 on Mohs scale; Color: Teal-blue to deep blue; Luster: Vitreous to sub-vitreous; Crystal Structure: Hexagonal; Specific Gravity: 3.16-3.22.

Hardness: 5 on Mohs scale
Color: Teal-blue to deep blue
Luster: Vitreous to sub-vitreous

Identified July 20, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Teal-blue to deep blue; Luster: Vitreous to sub-vitreous; Crystal Structure: Hexagonal; Specific Gravity: 3.16-3.22.

Formation & geological history

Usually forms in igneous environments through the crystallization of phosphate-rich magma, or in metamorphic rocks like marble. This mineral can also be found in sedimentary deposits as phosphorite.

Uses & applications

Primary source of phosphorus for chemical fertilizers. High-quality specimens are used in jewelry (though rare due to softness) and are popular among mineral collectors.

Geological facts

Apatite is the definitive mineral for hardness 5 on the Mohs scale. Biological apatite is the primary component of tooth enamel and bone mineral in humans.

Field identification & locations

Identify in the field by its distinct hexagonal crystal habit and its ability to be scratched by a steel knife but not by a copper coin. Commonly found in Madagascar, Brazil, and Mexico.