Silver and brass.
Mithras was a sun god in the middle east around the time that Jesus walked the earth. It is thought that a lot of practices of the Mithras religion have been adopted into Christianity. Mithras honors the life giving and taking properties of the sun. For life on earth, the sun is truly the source of all life.
These Mithras rings help you to connect to your inner source, whether that be a god, or the power of yourself.