mineral
Blue Apatite
Calcium Fluorophosphate (Ca5(PO4)3F)
AI-generated identification · may be incorrectHardness: 5 on Mohs scale; Color: Deep teal blue with dark inclusions; Luster: Vitreous to sub-resinous; Crystal Structure: Hexagonal; Specific Gravity: 3.16-3.23
- Hardness
- 5 on Mohs scale
- Color
- Deep teal blue with dark inclusions
- Luster
- Vitreous to sub-resinous
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Physical properties
Hardness: 5 on Mohs scale; Color: Deep teal blue with dark inclusions; Luster: Vitreous to sub-resinous; Crystal Structure: Hexagonal; Specific Gravity: 3.16-3.23
Formation & geological history
Formed in igneous environments like pegmatites and hydrothermal veins, as well as metamorphic environments. This polished specimen is likely from Madagascar.
Uses & applications
Primarily used as a gemstone in jewelry, though its softness requires care. Also used for metaphysical collections and as a source of phosphorus in fertilizer manufacturing.
Geological facts
Apatite is the specific mineral that defines the level 5 hardness on the Mohs scale. It is also the same mineral that makes up the tooth enamel and bones of humans and other vertebrate animals.
Field identification & locations
Identify by its characteristic teal color and lower hardness compared to beryl or tourmaline. It is often found as small crystals within larger host rocks.
