Xinler Accuracy Jewelry-Diamond Tester Pen Professional Jewelry Diamond Tester Tool

Great tested it on Dimond, moissanite and cubic zirconia. Works great can definitely identify real stones.

From I buy this product it never work the battery I put in it are all new batteries just waste of money

Had my LAST one for "8" years... But unfortunately, someone borrowed it, and didn't return it.. So just purchased this one with my fingers crossed, hoping this one will work.. Too many bad reviews, but this new one works too! I also use it to test my "moissanite".... Genuine moissanite "WILL" indeed test as a diamond. IF it's authentic moissanite. Had WAY too many moissanite rings purchased on Amazon, that were NOT moissanite as the sellers claimed!!! (angry emoji face). FYI; .. Only the brand "MOOSEA" moissanite proved to be genuine moissanite. Available here on Amazon. G-R-E-A-T prices too!!!

I followed the instructions. I know a little bit about gems. I was not getting readings for what I had already proven to be legit stones. The other problem that concern me is that the bag that the item came with contained a jagged piece of strange plastic that I was unsure was supposed to be a part of the unit itself or who knows. But I'm returning this. One star for trying. One star for nice instructions that unfortunately did not help with the products operation. Perhaps I indeed received a broken unit. I won't know because I'm not reordering this.

There is nothing negative to day about this little jewelry machine. Best purchase ever!