Pure Copper 4mm 1/2 Round Highly Polished Rings S9 1/2 dome round 4mm wide copper solid soldered rings. Bright and shiny new rings. Copper is a fast conductor of energy and conducts electrical impulses, thus magnifying any energy transfer. Being round, this copper helps to bring the universe energy to us as its color reflects our sun beautifully. Copper vibrates to number 1.