I have taken a discs of sterling silver, gold fill and rose gold fill and cut them to represent 2/3 of the circle and 1/3 of the circle. Just a little more unique in shape than half and half and I love asymmetry.
These necklaces can be made with a 25mm disc of sterling silver or gold fill and the rose gold fill version is made with a 22mm disc. The larger, 2/3 necklace is 19.5 inches in length and the smaller, 1/3 necklace is 18 inches in length and both are finished with matched metal cable chain.
Custom lengths or combinations welcome. I love to mix metals, so I would be happy to pair these discs with yellow or rose gold filled chain or oxidize the sterling discs or chain.