(2Pk) Professional Diamond Tester Pen Jeweler Tool
$23.99
$39.99
40% off
Reference Price
Condition: New
Style: 2 Pack
Top positive review
3 people found this helpful
It Works Perfectly
By BL on Reviewed in the United States on April 6, 2025
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.
Top critical review
2 people found this helpful
Little hard to use
By Jenny on Reviewed in the United States on January 28, 2025
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).
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