I am 97% sure they are Chipco. Back in 2005, I played with these at the casino, and only "ceramic " chips I recall at that time frame were chipco. I do not see the CI logo on them, which is why I am not 100%, but could be ultraviolet and I forget where my UV flashlight is. ( I have 14 racks or these and 2 racks of $20 for a limit set).