In ancient times, the Yap Islanders used large limestone discs as currency, some weighing over 4 tons. These stones were transported across the sea for trade.
Cowrie shells were once widely used as currency in various parts of the world, including Africa, Asia, and the Indian Ocean region.
During the California Gold Rush, miners used gold dust as a form of currency before the establishment of official mints and banks in the region.
In the prison economy, packs of mackerel fish have been used as currency due to their availability and stable value among inmates.
The Rai stones of Yap, made of limestone, were used as money by the Yapese people. These massive stones were valued for their size and history.
From stones to shells, and even fish, these unusual forms of currency have played a fascinating role in the history of money and trade.