UltraTester 3+ Diamond Tester | Test Diamond, Moissanite, White Sapphire Gemstone | Precision Tool with Expert Professional Reading & Accuracy

I replaced an outdated diamond tester with this and I love it!! You need to read and follow the instructions carefully before you start. It takes a little practice to hold/use the tester correctly to get an accurate reading. It becomes easy and fun to use once you get the hang of it. Other testers I have tried before detected moissanites as diamonds. I picked this Gemoro tester for its reliability in distinguishing the two.

First the probe tip cap broke, and the probe tip came off. I got it working but the chargeable batteries didn’t work, i place 2 set of different brand new batteries and still did not work, only works with the provided USB cable and its power supply adapter, i know for the cap my warranty is useless i take the loss but bad product, i regret not going with the same brand of tester i’ve been using for more than 20 years, better get Presidium tester, like old saying if it isn’t broke don’t fix it.

So far great, still checking and testing unit.

The GemOro UltraTester 3+ works well for testing natural diamonds, moissanite, and white sapphires with precision. However, I’ve noticed it struggles with lab-made diamonds, consistently showing them as moissanite. While it's a reliable tool for natural stones, keep in mind that it might not provide accurate readings for lab-grown gems. Overall, it’s useful but limited in this regard.

Wow. Simple and very easy to use. Thanks Rich

Got the GemOro Ultra Tester II on time as promised. The tester works OK, but the tip cone indicator does not work. Sound and LED display is OK, so the main functions are intact. It is easy to use and carrying case is fine. No response from their customer service on the cone indicator issue. In my experience, OK product but quality control could be better.

I love this tester! So far, it works perfectly, has identified all known quantities and I feel confident using it to identify stones that need testing. It's a little pricey but I'm willing to pay it to know which stones are diamonds and which are moissanite.

Had several of these all did well except last one is a disaster...wont work correctly. Junk out of Box.