Clear quartz is perhaps one of the most popular and easily recognizable crystals around. Clear Quartz is also known as crystal quartz and is a mineral made of oxygen and silicone atoms. Clear Quartz is known as the "master healer" and will amplify energy and thought, as well as the effect of other crystals. It's also said to aid concentration and memory. Physically, clear crystals are claimed to help stimulate the immune system and balance out your entire body. (Price of one gram is mentioned above. weight vary from piece to piece)