mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Hardness: 5 on Mohs scale; Color: Deep teal to electric blue; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.1-3.2

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

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Deep teal to electric blue; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.1-3.2

Formation & geological history

Formed through hydrothermal processes, typically found in pegmatites, metamorphic rocks like marble, and as a common accessory mineral in igneous rocks. Most blue gem-quality apatite is sourced from Brazil or Madagascar.

Uses & applications

Primarily used as a source of phosphorus for fertilizer in its massive form. Gem-quality specimens are used in jewelry (though soft) and are highly popular in metaphysical collecting.

Geological facts

Apatite is the defining mineral for level 5 on the Mohs hardness scale. It is also the mineral that makes up the tooth enamel and bones of many animals, including humans.

Field identification & locations

Identify by its characteristic teal-blue color and its inability to scratch glass but its ability to be scratched by a steel blade. Commonly found in Madagascar, Brazil, and Mexico. Collectors should look for the hexagonal crystal habit.