Tourmalated Quartz is Quartz with Black Tourmaline. Quartz is a great amplifier, enhancing the energy of other stones and can be easily and readily programmed. Black tourmaline is wonderful for protection and grounding. It can be used to purify and cleanse the emotional body, helping to get rid of depreciating thought patterns. 
Small size is 2.5-3”
Medium is 3.25-4”