Has Anyone Made an Artificial Diamond Ring?

DiamondRingThing asks: "I know that diamond engagement rings are a recent fabrication, and the two months salary required to obtain one is ridiculous. Diamonds are pretty however, and evil never keeps a good hacker down. I'd like to be able to give a diamond to my girlfriend that I know was forged just for her, without any blood on it, and without giving any money to DeBeers. That's why I won't buy an artificial diamond from a jeweler, as I suspect the cartel is involved at that level. Does anybody know anyone that has made their own diamond to set in a ring? How's the cost, and the quality? Thanks in advance."