Quartz - the most popular of the crystal healing stones. Quartz is the second most abundant mineral on the planet. Quartz is so abundant that almost every rock contains at least a small amount of it

This is the best stone for people with serious illness or energy disorder such as ME. It helps to get toxins out of the body. 

Healing: Master Healer. Can amplify, focus, store and transfer energy. Clears blockages and dissipates negative energy. Stimulates the memory and clears the mind. Treats chronic fatigue, arthritis, bone injuries, depression, diabetes, fibromyalgia, and intestinal troubles.

Cool facts: It  is used to make the internal parts of watches and to make many computer components. People in Ireland and other countries used quartz to make stone tools in prehistoric times.