mineral

Blue apatite specimen

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

AI-generated identification · may be incorrect

Typically blue to blue-green with vitreous-to-resinous luster; Mohs hardness 5, hexagonal crystal structure, and imperfect cleavage. The specimen appears as a rough, blue crystalline aggregate with brown matrix or inclusions.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms in igneous pegmatites, hydrothermal veins, and metamorphic rocks; individual crystals range from ancient Precambrian to younger geologic ages depending on the deposit. Exact locality and age cannot be determined from the image.

Uses & applications

Used as a phosphate source for fertilizer and occasionally as a gemstone; transparent faceted material is collectible, while opaque rough specimens are mainly mineral-display pieces.

Geological facts

Apatite is the reference mineral for Mohs hardness 5 and is chemically related to the mineral component of teeth and bones. Blue varieties are especially prized among collectors.

Field identification & locations

Identify by its vivid blue color, moderate hardness, hexagonal crystals, and glassy luster; distinguish it from turquoise by its crystalline texture and greater transparency. Common sources include Brazil, Madagascar, Mexico, and Canada.