I've had some, but they were obvious stars, like this one: https://www.instagram.com/p/BwViJsXFrk5/ What's funny about that one is that they forgot to read my note to slab it reverse forward.
I’ve had a lot I bought that way. Being more pggs oriented I tend to prefer them especially as ngc for me has not been toning oriented pcgs been better on non bs color details graded