Blue Apatite

Physical Properties

Hardness: 5 on Mohs scale; Color: Deep teal-blue to neon blue; Luster: Vitreous to sub-vitreous; Crystal structure: Hexagonal; Cleavage: Poor; Specific Gravity: 3.16 to 3.22.

Formation & Geological History

Formed in various environments including igneous pegmatites, metamorphic rocks (like marble), and occasionally in sedimentary environments through biological processes. It is often found in Madagascar, Brazil, and Burma.

Uses & Applications

Primary source of phosphorus for fertilizers in agriculture. Transparent, high-quality specimens are used in jewelry (though they are soft for rings), and polished stones are popular in the metaphysical and specimen collecting community.

Geological Facts

Apatite is the mineral that makes up the teeth and bones of all vertebrate animals. It is also often mistaken for other minerals like tourmaline or beryl, which is why its name is derived from the Greek word 'apate', meaning 'to deceive'.

Field Identification & Locations

Identify in the field by its distinct hexagonal crystal habit and its hardness (it can be scratched by a steel blade but not by a copper penny). Look for it in pegmatite veins or phosphate-rich sediments.

Identified on: 4/25/2026

Mode: Standard