can be as little as 3.5 cm in diameter. Many of them were brought from other islands, as far as New Guinea, but most came in ancient times from Palau. Their value is based on both the stone's size and its history. Historically the Yapese valued the disks because the material looks like quartz, and these were the shiniest objects available. Eventually the stones became legal tender and were even mandatory in some payments.

The value of the