What is a turquoise stone

Turquoise Rock

The chemical composition of turquoise rock is complicated, and it can vary based on where it is mined. The chemical formula of this stone is:CuAl6(PO4)4(OH)8·4H2O. What does this really mean? It means that turquoise rock is a combination of copper and aluminum in a phosphate base. It is an opaque stone that is fairly soft,…