mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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

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

Identified July 6, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in igneous rocks (pegmatites), metamorphic rocks, and hydrothermally. It is an accessory mineral in most igneous rocks and is sometimes found in sedimentary environments.

Uses & applications

Primarily used as a source of phosphorus for fertilizer. Gem-quality specimens are used in jewelry, though its softness limits use to earrings and pendants. Also used by collectors.

Geological facts

Apatite is the defining mineral for level 5 on the Mohs hardness scale. It is also the most common phosphate mineral in the world and is found in biological systems, including human teeth and bones.

Field identification & locations

Identify in the field by its hexagonal crystal habit (when present), its inability to scratch glass, and its solubility in acids. Common locations include Madagascar, Brazil, and Mexico.