Quartz

Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar.

Quartz is a  power stone, called the "Universal Crystal" because of its many uses. Enhances energy by absorbing, storing, amplifying, balancing, focusing and transmitting. Channels universal energy. Enhances thoughts, as they are a form of energy.