QUARTZ

Quartz is the second most abundant mineral in Earth’s continental crust, after feldspar.  Its crystal structure is a continuous framework of SiO4  silicon–oxygen tetrahedra, with each quartz makes an excellent gemstone.  It is hard, durable and usually accepts a brilliant polish.

Quartz is one of the most well-known minerals on earth.  Quartz is also the most varied of all minerals, occurring in all different forms, habitats, and colours.