[bi-metal, brass, smooth edged]		[ceramic tiles, groutless]

Since the weight and size are finely balanced, the bi-metalled Brazilian Real coin could be quite savory against a choice terrain such as the underground cross-concourse tunnel at Atlanta´s Hartsfield Airport. This would be an interesting matchup. The coin should be able to handle its own for a considerable amount of time before the terrain takes hold of the momentum.