they are made up of gold and silacone. They are programed for level of currency from the bank.
The Imperial Credit, like a Credit Card, but it’s robber proof. You have to give a password before using them, if wrong it detonates with a small explosive, not lethal, but it also covers the ner’ der wel’ in microscopic trackers.
This is the physical form of imperial credits. They are marked at the molecular level, this makes forging them very hard. It is a Death sentence to be caught passing counterfeit credits.