I would like a design for a coin in a fantasy world. In this world, an advanced ancient race which has since abandoned the world created these coins, though its purpose is unknown by the settlers that eventually discover them. The coins, referred to as "chipcoins" by explorers that find the island, are adopted as a viable currency.
The coins are actually electromechanical in nature, and the geometrical design on their surface hints that it is a circuit of sorts.
In this world, there are three planes of existence. One is the physical realm, another is an ethereal realm that overlaps with the physical one. The final plane transcends and encompasses both completely. It would be great if the design of the coin could hint at this relationship (perhaps two overlapping shapes encompassed by a larger shape?).
I would prefer this design to be 'clean', utilizing vector art with no shading. I would like there to be some detail, but nothing too small or superfluous. Ideally, if I took this to a coin maker, I should be able to stamp it onto a coin.
I have created a Pinterest board with some potential inspiration for the design.