Wholesale Lot Multi-color Gemstone Round Oval Cab Cabochon For Jewelry Making

What does the back of these look like?

Is each labeled? Or dose ot come with a chart to k ow what each stone is

I’m trying to get a refund due to not getting my order and there isn’t a way to get that. it keeps wanting me to return item that i dont have. help??

Can these be baked with polymer clay?