mineral

Blue apatite

Apatite, commonly fluorapatite (Ca₅(PO₄)₃F), polished/tumbled

AI-generated identification · may be incorrect

Typically blue to blue-green with vitreous-to-greasy luster, translucent patches, and indistinct cleavage; hexagonal crystal system. Mohs hardness 5, specific gravity about 3.1–3.2; the rounded form is tumbled and may show surface polish or fractures.

Identified August 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms in igneous, metamorphic, and phosphate-rich hydrothermal environments, often in pegmatites and alkaline rocks. Apatite is widespread and occurs from ancient Precambrian formations to young volcanic deposits.

Uses & applications

Used chiefly as a collector mineral and occasional gemstone; phosphate apatite is an important source of phosphorus for fertilizer, while gem-quality blue material is cut for jewelry.

Geological facts

Its name comes from the Greek apátē, “deception,” because it resembles several other blue minerals. Blue apatite is often confused with turquoise, aquamarine, or blue fluorite.

Field identification & locations

Identify by its vivid blue color, moderate hardness, glassy luster, and relatively high density; unlike turquoise, it is usually more translucent and lacks a waxy matrix. Common sources include Madagascar, Brazil, Mexico, Canada, and Norway.