Possible chrysoprase, peridot, green sapphire. Or chrysoberyl. I'm only a beginner but from my charts in my books, its gotta be one of them! Hope for your sake it is sapphire! I don't know how you would properly do it, maybe someone else will correct me on this too, but if you can't put a scratch in the green stone with a bit of quartz, its sapphire. Too hard to tell with rock #2.