Clear quartz is the most iconic of the quartz family. One of the most abundant minerals in the world, clear quartz can develop in a wide range of environments and can be found on every continent. For this reason, quartz is tied into the lore of many ancient cultures from around the world. The term “quartz” comes from the Greek word for “ice.” Clear quartz is rated at a 7 on the Mohs hardness scale. Clear quartz is thought to promote understanding and clarity and is associated with inner strength.