Tungsten rings are great: super-shiny, scratchproof, and there's something very cool (IMO) about wearing something that NASA uses to make rocket engine parts
True, i am also fascinated with unusual/exotic metals - those that the average Joe doesnt get to hold and play with on a decade to decade basis. Copper, Lead, Zinc, Aluminium, Iron, Steel, Nickel, even Gold and Silver !? Its been done before. But holding a titanium, tantalum, indium, platinum, palladium, rhodium or similar bullion is something to remember!