Play Diamond Dozen slot game. USA players accepted and no download necessary! Diamond Dozen is a 5 reel video slot game and we have a free demo version of Diamond Dozen slot machine to play from browser. Although Diamonds are a girls best friend, they can also be great friends to men who are lucky enough to win the big jackpot on Diamond Dozen slot. There are a few other way to win those diamond riches which include, a 100x multiplier and 12 free games with all winnings being double. Play for free till your heart’s content, but pay for real money to cash in those diamond riches.