Jeweler's Diamond Testing Pieces-Professional Loupe and Electronic Diamond r Machine

I was able to use the tester on what I knew was diamond as well as what I knew was not, and it got it right. You just have to make sure to calibrate it correctly and they give you some good details regarding that! No problems using it!The loupe was also clean and easy to use as well, no problem there.

The diamond tester is super easy to use, and was perfectly accurate for my purposes. It comes with a little holder for loose gems, and a rough gauge for the weight of your stone (which I did not need for loose stones, because I have a scale, but which turned out to be handy for guesstimating the weight of set stones without having to remove them from the jewelry).The loup was not exactly what i had expected, but fine for just getting a closer look at a stone. What was so great, though, is that when I mentioned the issue to the seller, they went out of their way to fix it for me, which I think was darned generous! Very happy with my experience, here.

I ordered the Culti "brand" but Amazon substituted an identical-looking tester labeled "Puritest P7". I placed this order because the version I had previously bought, labeled HDE, was defective (constant beeping regardless of dial setting). The good news is that the Puritest one I received today does behave as described in the instructions and did correctly identify my wife's diamond ring. It did not react at all to her fake diamond earrings. Bottom line, I believe all these $15-20 testers are pretty much the same, are able to identify diamonds if used correctly, and getting one you're happy with is luck of the draw. BTW, don't trust YouTube videos on these testers because it's obvious that most YouTubers have not read the instructions. Good luck!

Everything is a diamond. Even my breath if I blow real hard. I know it wasn’t a lot of money, but I don’t like any situation where money was wasted.

This diamond tester was easy to use and accurate. You cannot beat the price here, and it will save you a lot of trouble when people try to sell you fake diamonds. I have a small business, and customers often want to trade their diamonds up, and this is 100% foolproof. Sometimes it's hard to tell them what they have is a CZ and not a diamond, but this professional diamond tester takes the guesswork out of it, and guarantees accuracy. It's always nice to have an extra loupe, too, which is included with the order.