Quartz is the most widely mined stone in the world and also one of the most varied. Quartz is a silicate mineral made up of silicon and oxygen atoms in an octahedral arrangement. There are many varieties of quartz.
Quartz is the most widely mined stone in the world and also one of the most varied. Quartz is a silicate mineral made up of silicon and oxygen atoms in an octahedral arrangement. There are many varieties of quartz.