I made this bracelet with 8 mm beads. Grey Chalcedony can bring the mind, body and spirit into alignment. The stone also helps to build self-confidence, remove sadness and absorb negative energy. A very powerful healing and cleansing stone. Rainbow obsidian is said to help remove negativity and make room to let the positive light in. Rainbow obsidian can act as a bridge that can bring hope into your spirit where it may be filled with darkness or despair.