I have found the board breaker the most reliable way to obtain pink diamonds without cheating. But, it is random, you might have to break a lot of boards before one appears, then you could, if lucky, get three in a row. If you don't mind a little manipulation, then, put a couple of extra tills in the consignment store. Occassionally the consignment store has a heart shaped pink diamond available. The more tills, the more chance. A non cheating way to increase your chance of a pink diamond in the store is to buy everything from the store so that the store has to restock. This method can be dreadfully expensive though as your purchases are seldom worth as much as you paid. Good luck.