mineral

Blue apatite rough

Apatite-group calcium phosphate, commonly fluorapatite (Ca₅(PO₄)₃F)

AI-generated identification · may be incorrect

Translucent turquoise-blue, glassy luster, uneven fracture and no obvious cleavage; hardness 5 on Mohs scale, hexagonal crystal system, specific gravity about 3.1–3.2. The photo alone cannot confirm the identification; blue fluorite or dyed material can look similar.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Apatite forms in igneous and metamorphic rocks, pegmatites, and phosphate-rich sedimentary deposits; its age depends on the host deposit and may range from recent to billions of years.

Uses & applications

Used chiefly to make phosphate fertilizer; transparent blue material is cut for jewelry, while rough pieces are collected.

Geological facts

Apatite is the mineral that defines Mohs hardness 5 and is also the main mineral component of bones and teeth.

Field identification & locations

Blue apatite occurs in localities including Madagascar, Brazil, Mexico, and Russia. Check for natural color zoning, hardness, and crystal form; avoid scratching the specimen, since apatite is relatively soft.