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

Accurate and easy to use.

This thing sucks. The battery is always dead. It worked maybe once.

Wow. Simple and very easy to use. Thanks Rich

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.

I replaced an outdated diamond tester with this and I love it!!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.

Used as instructed but something seemed off about this device. I tested a battery head and the device read it to be a diamond smh total waste of money.

I used this tester for all applicable vintage and designer jewelry. The tester always correctly identified the diamonds and sapphires.This time it detected moissanite on what was sold to me as one carat diamond incrusted earrings. I was able to return the jewelry and saved a lot of money.

It does work but it's not reliable. One of the diamond it show reading for both moissanite and diamond. We still have to bring it in to the shop.