mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
AI-generated identification · may be incorrectHardness: 5 on Mohs scale; Color: Neon blue to teal; Luster: Vitreous to sub-vitreous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.16 to 3.22.
- Hardness
- 5 on Mohs scale
- Color
- Neon blue to teal
- Luster
- Vitreous to sub-vitreous
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Physical properties
Hardness: 5 on Mohs scale; Color: Neon blue to teal; Luster: Vitreous to sub-vitreous; Crystal structure: Hexagonal; Cleavage: Poor; Specific gravity: 3.16 to 3.22.
Formation & geological history
Forms in igneous rocks like pegmatites, metamorphic rocks, and occasionally sedimentary rocks through hydrothermal processes. Apatite is a group of phosphate minerals found worldwide.
Uses & applications
Used primarily in jewelry as faceted gems or cabochons, and as a source of phosphorus for fertilizer production in industry. Highly valued by mineral collectors for its vibrant color.
Geological facts
Apatite is the defining mineral for hardness 5 on the Mohs scale. The name comes from the Greek word 'apatein', which means 'to deceive', because it was often mistaken for other minerals like peridot or beryl.
Field identification & locations
Identify by its characteristic neon blue color and hexagonal crystal habit. It is softer than quartz (which has a hardness of 7), helping to distinguish it from blue topaz or sapphire in the field. Common locations include Madagascar, Brazil, and Mexico.
