mineral

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH) (Calcium phosphate with Fluorine, Chlorine, or Hydroxyl)

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

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

Identified March 11, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

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

Formation & geological history

Formed through various geological processes including igneous crystallization in pegmatites, hydrothermal veins, and metamorphic environments. It is a common accessory mineral found throughout geologic history from Precambrian to modern times.

Uses & applications

Apatite is the primary source of phosphorus used in fertilizers and chemical industries. This specific blue variety is popular as a gemstone (faceted or cabochon) and is highly sought after by mineral collectors for its vibrant color.

Geological facts

Apatite is known as the 'Deceiver Mineral' (from the Greek word 'apate', meaning to deceive) because it can easily be mistaken for other minerals like tourmaline, aquamarine, or amethyst. It is also the specific phosphate mineral produced for human teeth and bones.

Field identification & locations

Identify in the field by its hexagonal crystal habit, distinct blue color, and the fact that it can be scratched by a steel knife (distinguishing it from beryl or quartz). Commonly found in Madagascar, Brazil, Mexico, and Myanmar. Collector tips: store away from acids and high heat as it is chemically sensitive.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral