mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Hardness: 5 on Mohs scale; Color: Deep teal-blue; Luster: Vitreous to sub-vitreous; Crystal Structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.16-3.23

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

Identified June 30, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Deep teal-blue; Luster: Vitreous to sub-vitreous; Crystal Structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.16-3.23

Formation & geological history

Formed through igneous processes in pegmatites and hydrothermal veins, or as a primary constituent in phosphate rock (sedimentary). It is found throughout multiple geological eras.

Uses & applications

Apatite is the main source of phosphorus for fertilizers. Blue specimens are used for jewelry (though rare due to low hardness) and as decorative pocket stones for collectors.

Geological facts

Apatite is the defining mineral for level 5 on the Mohs scale. The name comes from the Greek word 'apate', meaning 'to deceive', because it was often mistaken for other minerals like beryl or tourmaline.

Field identification & locations

Identify by its characteristic teal color and lower hardness compared to beryl (which it resembles). Found commonly in Brazil, Madagascar, and Mexico. Collectors should look for its unique greasy-to-glassy luster.