Topaz
$Al_2SiO_4(F,OH)_2$
Family
neosilicates
Crystal system
orthorhombic
Color
colorless, yellow, pink, blue, greenish
Streak color
white
Cleavage
1 perfect basal cleavage
Hardness
8
Density
3,4 to 3,6
Explanations: →
Here
List of minerals: →
Here
