Density: 3.1 - 3.2
Lustre: Vitreous, glassy
Colours: Grayish blue-green, or any.
| ||Crystal System: Hexagonal|
Reaction with HCl: Weak
Identification in hand sample:
Colour, crystal habit and hardness are good indicators.
Common accessory mineral in all environments.
Industrial / ecomonic uses:
Source of phosphate used in fertilizers and other industrial applications. Fluorine is also extractable from apatite.
Same stuff as in bones and teeth.