[bi-metal, brass, smooth edged]		[industrial carpet stitch, hardwood]

Since the weight and size are finely balanced, the bi-metalled Brazilian Real coin could produce effective results on a roll at a splendid flooring such as the spiraling ramps of the Guggenheim. This would be an interesting matchup. The coin should be able to handle its own for a considerable amount of time before the flooring takes hold of the momentum.