mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Hardness: 5 (Mohs scale); Color: Neon to teal blue; Luster: Vitreous to sub-vitreous; Crystal Structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.16–3.22

Hardness: 5 (Mohs scale)
Color: Neon to teal blue
Luster: Vitreous to sub-vitreous

Identified March 16, 2026More mineral →

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Physical properties

Hardness: 5 (Mohs scale); Color: Neon to teal blue; Luster: Vitreous to sub-vitreous; Crystal Structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.16–3.22

Formation & geological history

Formed in igneous pegmatites, hydrothermal veins, and metamorphic environments such as marbles. Some deposits date back over a billion years, while others are relatively younger.

Uses & applications

A major source of phosphorus for fertilizer; used as a gemstone in jewelry (earrings and pendants) and for lapidary work; popular among mineral collectors.

Geological facts

Apatite is the stone that defines '5' on the Mohs scale of mineral hardness. It is also the same material that makes up the enamel of human teeth.

Field identification & locations

Identify by its 'neon' blue color and its inability to scratch glass but susceptible to a steel knife. Commonly found in Brazil, Madagascar, Mexico, and Myanmar. Use a hardness test to distinguish from Beryl or Quartz.