mineral

Blue apatite crystal cluster

Apatite-group mineral, most likely fluorapatite — Ca₅(PO₄)₃F

AI-generated identification · may be incorrect

Blue to teal, vitreous luster, with prismatic crystals and glassy faces; Mohs hardness 5, hexagonal crystal system, and indistinct cleavage. The image suggests a crystal cluster on a pale matrix; exact composition cannot be confirmed visually.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Apatite forms in igneous and metamorphic rocks, pegmatites, and hydrothermal veins; it may also crystallize in sedimentary deposits. Its age depends on the host deposit and cannot be inferred from the image.

Uses & applications

Apatite is used chiefly as a source of phosphate for fertilizer; transparent, well-colored crystals are cut as gemstones, though they are relatively soft.

Geological facts

Apatite is the defining mineral of Mohs hardness 5 and occurs as a trace mineral in many rocks. The pictured saturated blue color and clustered prisms are characteristic of collectible specimens.

Field identification & locations

Look for hexagonal prismatic crystals, glassy luster, and hardness near 5; common sources include Brazil, Madagascar, Mexico, and Canada. Avoid confusing it with harder beryl or tourmaline.