mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
AI-generated identification · may be incorrectHardness: 5 on Mohs scale; Color: Neon blue to dark teal; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor/indistinct; Specific gravity: 3.1–3.2
- Hardness
- 5 on Mohs scale
- Color
- Neon blue to dark teal
- Luster
- Vitreous to sub-resinous
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Physical properties
Hardness: 5 on Mohs scale; Color: Neon blue to dark teal; Luster: Vitreous to sub-resinous; Crystal structure: Hexagonal; Cleavage: Poor/indistinct; Specific gravity: 3.1–3.2
Formation & geological history
Formed through magmatic and sedimentary processes, often found in pegmatites, metamorphic rocks like marble, and sedimentary phosphate deposits. Common in both igneous and metamorphic environments.
Uses & applications
A primary source of phosphorus for fertilizer. High-quality specimens are used as gemstones and in jewelry, while rough specimens are popular for mineral collecting and metaphysical practices.
Geological facts
Apatite is the mineral that defines index 5 on the Mohs scale of mineral hardness. It is the same material that comprises the enamel on human teeth.
Field identification & locations
Identify in the field by its distinct hexagonal crystal habit and its inability to scratch glass but capability to scratch fluorite. Found globally with major deposits in Brazil, Madagascar, and Mexico.
