"Molly" and "moonrocks" are brand names, not drugs. You can sell any random crystal as a "rock from the moon"... it doesn't have to just be MDMA.
Reagent testing kits are the only way to know if some nasty rocks your shady dealer is calling "Molly" is actually MDMA (the love drug) or bath salts (MDPV, methylone, mephedrone, a-PVP... the list goes on.)
Almost every drug in pure form comes as a crystal, you can sell them all under any name you want... it doesn't make it MDMA. I'm going to close this.. doesn't really seem like this thread can go anywhere.
Look over the "6 simple rules to MDMA thread" if you need more information, or feel free to PM me with further questions