High Accuracy Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black)

The media could not be loaded. I inherited a lot of jewelry and I needed a way to see if it was all real or not. I used this diamond tester on around 25 pieces of jewelry that I already owned and it was 100% correct on all of them. I tested both large and small diamonds and as you can see in the video you need a steady hand for smaller diamonds because if it touches the metal you’ll get an inaccurate reading. You also need to frequently re-adjust the calibration because it can get too hot and mess up the reading. As long as you are able to eyeball the carat weight of a diamond, you will do just fine with this tester, in my opinion. If you don’t know what a carat, .5 carat “looks” like you should familiarize yourself because that’s the basis of the calibration. Instructions were clear and easy. I highly recommend.

This works good! I was just hoping it had a rechargeable battery, it turns out it requires a 9 V battery to work. One is included so that’s good! I just thought it was rechargeable.

It does the job but I found out that it may not be accurate so a little disappointed

It’s lightweight and not very bulky. I purchased this because of the great price. It comes with a carrying case but plan on getting a hard case down the road. The tip for the detector has its own protective cap on it which is nice. Battery was easy to install and instructions were easy to understand. Not sure on durability as I haven’t put it to the test but it seems okay. Accuracy seems on point with my other one. The brightness for the screen is good.

This is very sensitive to temp which makes it kind of hard to calibrate. However, once it is calibrated, it seems to work well on everything but earrings (probably due to stud blocking electricity flow). I tested on known diamonds (rings/bracelets) and known fakes and it was accurate only after calibration (meaning use a known diamond to get it to temp and accurately reporting it as a diamond). I would not use this without calibrating each time you use it as it is very easy to get a false reading and that could be a costly mistake. (I did not test using loose stones and I would not trust this for that at all as it seems very sensitive).

cheap, not accurate, lights are erratic & it’s way smaller than the ones I used to get 8 years ago! returning!

Great

Great tool for when you want to buy gems