mineral
Blue Apatite
Apatite Group (Ca5(PO4)3(F,Cl,OH))
AI-generated identification · may be incorrectHardness 5 on Mohs scale, deep teal-blue color, vitreous to greasy luster, hexagonal crystal system, poor cleavage, specific gravity 3.1-3.2
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Physical properties
Hardness 5 on Mohs scale, deep teal-blue color, vitreous to greasy luster, hexagonal crystal system, poor cleavage, specific gravity 3.1-3.2
Formation & geological history
Forms in igneous rocks like pegmatites and nepheline syenites, as well as metamorphic rocks and hydrothermal veins.
Uses & applications
Used primarily for jewelry (beads, cabochons, carved ornaments), mineral specimens, and major industrial source of phosphorus for fertilizers.
Geological facts
Apatite defines level 5 on the Mohs hardness scale. Its name comes from the Greek word 'apate', meaning 'deceit', because it was historically often confused with other gemstones like beryl, tourmaline, and topaz.
Field identification & locations
Identify by its distinctive teal/blue-green color, vitreous luster, and moderate hardness (scratched by glass or a steel knife). Commonly found in Madagascar, Brazil, and Mexico.
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Epidote
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Granite
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Septarian Pebble
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