Clear Quartz 30 mm Heart And Mini Ball -clear quartz is also known as crystal quartz or rock crystal. it is a natural form of silicon dioxide and is a 10th anniversary gemstone. for chakras –crown chakra for zodiac – all birth signs planet – sun element – all (earth/fire/air/water) typical colours – pure quartz is colourless or white clear quartz is known as the “master healer” and will amplify energy.