Tayden

A Tayden is the basic monetary unit of currency that is used by the aliens in Undertown and most likely by all other residents in the galaxy, due to the fact that it is composed of the element Taydenite.

Appearance
A tayden is a small piece of taydenite that is shaped like a gemstone and has an alien symbol stamped on it, which is presumably its denomination. It is roughly the size of a quarter.

Value
It has not yet been specified as to how much a tayden is worth, though its value is significant being made of taydenite. In Hot Stretch, Ben used a tayden to buy a bottle of water, while in Special Delivery, he received varying amounts of taydens for his deliveries. Quite possibly, the tayden is the alien equivalent to the dollar, and differnt symbols may indicate various denominations, (much like the $1, $5, $10, etc).