Apatite (blue, yellow,green)
Feature | Specification |
Chemical Formula | Ca₅(PO₄)₃(F,Cl,OH) |
Color | Colorless, green, blue, yellow, or purple |
Hardness | 5 on the Mohs scale |
Density | 3.1–3.2 g/cm³ |
Luster | Vitreous (glassy) |
Crystal System | Hexagonal |
Cleavage | Poor to imperfect |
Transparency | Transparent to translucent |
Occurrence | Found in igneous, sedimentary, and metamorphic rocks |
Uses | Fertilizers, gemstone, industrial applications |