I wish I had gotten one of these with more power. I remember reading reviews when I bought, with people pointing out that it might not be 30x like it claims. I have no way to verify that, but I can say that I wish it had more power. If this is 30x, then 60x would probably do the trick.

Side note: if you're looking into diamonds like I was (perhaps for an engagement ring) I recommend checking out the knowledge tab at pricescope dot com, and posting in their forums with any questions. Then look into buying from dedicated cutters via mail order with GIA or AGS reports. You'll save money and get higher quality that way. Don't skimp on the research, fellas!