Prisoners from all around the world and all throughout history are known to handcraft dices from bread, often choosing hunger over boredom. These dices were made from wood and presumably under less grief circumstances. What reveals the amateurism are mostly the irregularly carved dots. Since millions of dollars can be at stake, casinos have made dice- production a true science. In fact, every dice you will encounter in a casino has a serial number, in order to detect smuggled in rigged dices.