The Island of Yap, Micronesia used Rai stones as currency. These stones were huge and the largest were 12 ft in diameter, 1.5 ft thick and 4 metric tons (8,800 lb) in weigh.
fact
The Island of Yap, Micronesia used Rai stones as currency. These stones were huge and the largest were 12 ft in diameter, 1.5 ft thick and 4 metric tons (8,800 lb) in weigh.