Banded Calcite-Onyx "Amplifier Stone" crystals have wonderful, quite powerful attributes, and they are very easy to use. By simply holding one in your hand, you can create an amazing flow of energy through your body, as they are strong energy amplifiers. Whatever color you choose, these stones are excellent assets to have present in your home, business or in your healing area, as they are well known to assist you to cleanse your environment. They help to clear negative energy and bring an increase in the good vibrations present. The list of different varieties of this crystal is quite long. All colors are helpful, as they are powerful amplifiers and cleansers, particularly of the emotions. 4% of the earths material is calcite. Onyx refers to the parallel banding, where most agate have chaotic banding found throughout the world.