An "obol" is an ancient Greek coin that was typically made of silver. It was a small denomination, often used in everyday transactions. The obol was worth one-sixth of a drachma, which was a more significant currency in ancient Greece. These coins often featured various designs, including images of gods, goddesses, or symbols representing different city-states. In addition to its use in trade, the obol had a cultural significance in ancient Greece. It was commonly associated with burial practices, as it was believed that placing an obol in the mouth of the deceased would pay the ferryman Charon for passage across the River Styx to the afterlife.