You have to take a close look to see if the dice are totaly finished or not. Do they have scalping marks (curved lines or crosshatching) from the machining process? Also many reject dice will have a raised logo, almost always in hotstamp gold foil. Ther may also be logos from 2 diferent casinos on the same die. If you know of a casino who actualy cancels dice I this maner I would like to know. All the dice I have ever run across with the gold hotstamp "O" have have been unfinished on close examination. It is posible that a casino gift shop will sell such dice, They are available in almost all the non casino gift shops in Vegas.