Which country is known for the traditional currency called rai stones?

The traditional currency called rai stones is specifically associated with the island of Yap, which is part of the Federated States of Micronesia. Rai stones are large, circular limestone disks that were historically used as a medium of exchange and have significant cultural value. Each stone's value is determined not just by its size but also by its history, including how far it was transported to Yap. This unique form of currency reflects the complex social and economic systems of the island's inhabitants.

In contrast, the other options do not feature rai stones as traditional currency. Kiribati, the Solomon Islands, and the Philippines have different forms of currency that reflect their respective economies and cultures. Understanding the significance of rai stones helps illustrate the diversity of monetary systems globally and the cultural importance of different types of currency.