Clear quartz has its main focus on eliminating negative energies. It is known to be an excellent charm to avoid evil energy. It is very useful when you want to regain positive emotions and thoughts. It helps to produce optimistic views and ideas. Clear quartz is also known an a crystal energy amplifier and will increase other crystal's energies and properties. Sizes vary but range between 1 3/8" - 1 5/8" These are natural stones. There will be pattern and slight color variations.