
Why are mint marks put on coins?
I've always been curious about the small letters or symbols on coins, known as mint marks. What is the purpose of putting these marks on coins? Why are they necessary and what do they represent?


What do Qi coins do?
I've encountered some Qi coins in my travels, and I'm curious about their purpose. I've heard rumors that they have some special powers or uses, but I'm not sure what exactly they do. Can someone explain the function of Qi coins?


What is the purpose of cobs?
I'm curious about the purpose of cobs. I want to know why they exist and what their main function or use is.


What is rook used for?
I'm curious about the purpose of rook. I've heard about it in some contexts but I'm not entirely sure what it's specifically used for. Could someone explain its main function or application?


What is DEXA used for?
I'm curious about the application of DEXA. Could someone explain what it is primarily used for?
