cowry shells
No, they used Cowry shells as their currency. But gold, salt and copper was also accepted.
Cowry shells were the first known currency of China
First Metal Money. China, in 1000 B.C., produced mock cowry shells at the end of the Stone Age.
Cowrie and cowry shells were replaced by coins and moneys in the medieval time. This happened back in 1000 BC.
A mock cowry shell is a type of shell that resembles a true cowry but is not from the same family. It typically belongs to the family Eocypraeidae and is often used in jewelry and decorative items due to its glossy appearance and attractive patterns. Unlike true cowries, mock cowries are generally smaller and have a different shell structure. These shells are often collected for their aesthetic value rather than for their rarity.
Great Wall Cowry was created in 2008.
There are many which might have oval or close to oval shells, but one that comes to mind quickly is the cowry, some of which are nearly perfectly olive shaped (Class Gastropoda, Family Cypraeidae).
Currencies based on natural tender rather than man-made tender will be the hardest to forge. Cowry shells are difficult to forge, so are rare metals (such as gold), and most minerals (such as diamonds).
Well, the Anishinabe people lived around the Great Lakes. Archeological evidence and oral translation of customs has shown that they used cowry shells in ceremonies. These shells only develop along the coast of the ocean. This indicated a large trade network with other First Nations who lived on the coast.
cowry shell
Cypraea tigris