Stone money is still being used!

　This doughnut-shaped stone money, made from limestone rocks, is not recognizable as money anywhere else, but is still used in some parts of the Yap island—mainly as a betrothal gift. It is said about 12,000 pcs of the stone money currently exist, and are scattered around the island. Some of them sit at the bottom of the ocean, but each has a specific owner. The sizes of the money range from only 20 centimeters to 5 m in diameter. There are also a different types of money, including one with 2 holes in the center.
Interestingly, each stone carries its own historical tale that has been passed down to every owner of the stone from generation to generation. It is also said a stone's value was determined upon the significance of its story.
Since limestone was nonexistent in Yap (it was quarried and shipped from the Malakal region of Palau by canoe or raft), there is abundant folklore about the birth of stone money, which has survived to this date. [More details about this exhibit]