Diamond Tester Jewelry Gem Stone Tester Moissanite Tester Professional 2pt Jewel Stone Combo Tester Kit for Diamond, Moissanite, Metal and Gemstone Selection - High Accuracy Jeweler Test Meter Device

I bought this jewelery tester so I can tell what is real and what is not from my own personal jewelery collection. Over the years I have bought a number of diamond stud earrings, and got some from a family member. Even I could no longer tell what was cubic zircon and what was real. Right out of the box, put batteries in, charged it up and put it to work on items I knew were real. It was accurate each time I ran the test. Even tested some costume jewelry, the device was not easily fooled! So far, I have to say I am pleased with this purchase, and hope it continues to do it's job! Although somewhat pricey, sometimes you get what you pay for! It's a little chunky, and you have to learn how to hold it precisely to get accurate results from testing. Keep that in mind.

As a professional jeweler that specializes in high end custom pieces, I hate to say that this tester is absolutely not accurate at all nor is it the easiest to use. For $100 I expected better.Smaller real authentic diamonds sometimes test as moissanite and larger moissanites often test as authentic diamonds.Moissanite will sometimes always read as Diamond on other testers, especially if it’s good moissanite but diamonds should never read as moissanite.In addition the prong can be weird to work with sometimes and no different prongs means if it doesn’t work for the piece you’re trying to test that you’re stuck with it. It would’ve been nice to see a few different prongs for properly working with different gem sizes.All and all, this is no different from the $20 tester you can get on here.

This dual diamond/moissanite tester is very accurate. I have found that most dual testers under $200 will not accurately and consistently test moissanite stones under .25ct. they will test them as diamonds. I have tested dozens of small moissanite stones as small as 10 points, and all tested as moissanite. The only negative I have about the tester is the half minute wait for it to warm up, batteries don't last long. You really need to use an AC adapter (not included).

Muy buen producto, servicio de envío rápido, bien empacado

Works best on larger stones. Small stones were tedious and difficult to get a reading on, in some cases could not get an accurate reading. Good for home use to sort out jewelry, but I would not use professionally. I was glad I bought it to sort out my earrings and find what I thought were a missing pair of diamonds mixed in with some white sapphires.

A better one would be much more expensive— this one very good for price

As you can see this piece of crap just tested a lighter as a diamond this is a total Fail.

This seems to not register really cheap diamonds. If I put it in my costume jewelry, nothing at all shows up. When I used it on known diamonds, sometimes it said diamond and other times moissanite when testing the same stone. Not very helpful when I went to test the unknown jewelry and it did the same sometimes giving me the reading of a moissanite and others a diamond.