mineral

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F

Hardness: 5 on Mohs scale; Color: Deep teal blue with reddish-brown hematite/matrix; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.1–3.2

Hardness: 5 on Mohs scale
Color: Deep teal blue with reddish-brown hematite/matrix
Luster: Vitreous to sub-resinous

Identified April 5, 2026More mineral →

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Physical properties

Hardness: 5 on Mohs scale; Color: Deep teal blue with reddish-brown hematite/matrix; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.1–3.2

Formation & geological history

Formed in igneous pegmatites, metamorphic rocks, and occasionally in sedimentary environments. Large crystal masses like this one typically originate from pegmatitic or hydrothermal veins.

Uses & applications

Used primarily as a source of phosphorus in fertilizer and chemicals. High-quality specimens are used in jewelry (though fragile) and as popular metaphysical or collector stones.

Geological facts

Apatite is the mineral that makes up the tooth enamel of humans and other vertebrates. The name 'Apatite' comes from the Greek word 'apate', meaning 'to deceive', because it was often confused with other minerals like tourmaline or beryl.

Field identification & locations

Identify by its characteristic blue color and lack of high hardness (it can be scratched by a steel blade). Look for hexagonal crystal cross-sections. Common sources include Brazil, Madagascar, and Mexico.