The Battle of Iwo Jima's black sand invasion beaches - and the US Marines' almighty struggle across them - were made famous by Hollywood's Sands of Iwo Jima. While Iwo Jima is now closed to the general public, visitors have collected Iwo Jima beach sand and put it up for sale.
Could these coins for sale, minted in 1221 by the Malik of Kurzuwan while under siege by the army of Genghis Khan, be some of the only collectible artifacts firmly associated with the Mongol conqueror?