Can anyone tell me what kind of chips these are. I have some catalox chips that seems to have a similar look but these are different and made of different material and are flat unlike the catalox have indents on them. I have seen ones called Catalin but they don't have this same swirl.

I am a newbie to chips so sorry if this is a silly question. I have been trying to find some similar so I can sell the set but can't seem to identify them

Thank you