The listing, Upcycled Embellishment - pack of 5 has ended.
These are used microchips from printer cartridge remanufacturing. One style has green, hard plastic with two holes on one end (perfect for jump rings or wire), gold squares, and a raised black dot in the center. The other style is red plastic with some circuitry in the center.
Let me know which style you like, or I will send a mix.
I suspect that the gold is actually a very thin layer of conductive gold, which has no value but means it probably won't tarnish. So many possibilities!
I can do larger quantities with GIN and am willing to create an auction to that purpose. Message me and we will work out details.