For my friend Matt's wedding, we came up with this ring of two pieces of 14K yellow gold sandwiching a piece of mahogany. The whole assembly is riveted together in the four corners--the ring is completely cold-forged, no torch or bonding agent was used in the process. Matt and his wife Michelle actually picked the wood themselves, which lends a very personal quality to the ring. Viewing the ring from the side, you can more clearly see the rivets and the rounded-square shape of the ring.
Mahogany, 14K yellow gold