Check my 1st responce.
"Yours are probably Wagon Wheel like Gary said. I say that because of the blue chip."

I stand by this statement.
"If you only found a black chip by itself at a flea market, you could not confirm it was a CA chip. The two blacks are exactly the same."

"You" not meaning "You" but meaning "anyone" that finds a black at a flea market ETC ETC ETC.