Mens Copper Bangle 6×2000 gauss magnets. Copper and the care of your Bangle/Bracelet: Copper has been used for healing by mankind for centuries. It is an essential metal that our body needs. It is believed that copper has an anti-inflammatory effect. Copper will leave a green/black residue on the skin, this is good as it indicates that the copper is being absorbed. It can be easily washed off with soapy water. We recommend that you clean your bangle or bracelet regularly with jewellery polish and then rinse.