Chemical composition is Silicon Dioxide [ SiO2] .
Main colour is orange red. Other colours are yellow, brown, purple, gray, pink and green.
Reddish brown, white, brown, black and many more.
6.5 â€“ 7 Mohs
2.65 - 2.66
Varies between 1.543 to 1.554
Translucent to opaque
Usually it is dyes or stained.
|Found worldwide. Few countries to name are India, Pakistan, USA, Germany, Brazil, Mexico, Czechoslovakia and Africa.|
Avoid sharps blows , large temperatures changes and harsh chemicals.