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Kevin Faill
2025-08-18 17:13:30
It's a great looking tool, it comes packaged like it's some presidential gift, and it works impossibly amazing and quick with super easy to understand visual and audio results. I purchased the same one that the better pawn and jewelry buyers use, but it couldn't tell the difference between diamonds and moissanite and would also sometimes give inaccurate readings with other simulant stones. I almost threw away a couple 1 ct diamonds that the other reader read incorrectly. (that I purchased being told that they were fake when purchasing the jewelry for the gold scrap) fortunately I got this tester before I tossed the bulk of "fake" stones and caught the mistake. I still didnt trust the reading because I was told by the seller that they were fake, so I had them tested through center street gold and silver, (who sent them to someone they work with) and i in turn made $4,500 on the diamonds that i would've thrown away had i not gotten this tester! I cant say how happy I am with this tool! Now I've just gotta figure out what to do with the damn GemOro that I bought 1st!
L.Hana
2025-08-15 12:50:13
Item is defective. It’s inaccurate and gives false positives as well as false negatives.I purchased a Moissanite earring set and a Moissanite ring in order to test this unit. This consistently tests the Moissanite items as Diamond. When I attempt to calibrate the unit with the Moissanite ring/earring, it will test the real diamonds as either diamond or Moissanite. It’s inconsistent and after a few tests reverted back to testing the Moissanite as a Diamond. Disappointed and returning.
Veronica Y. Ledezma
2025-07-28 17:01:23
Best diamond tester ever!It test the difference between a diamond and a Masonite!
Malik
2025-07-07 16:44:26
Presidium Adamas is a well known brand in the jewelry industry. It has other great and reliable products, but not with this one. At least the unit I received. The build quality is cheap. Battery cover never secure and I had to tape the cover to keep it in place. For paying over $300 I expect very accurate reading. However this unit gave different readings for the same stones!It was unreliable for me.
Luis
2025-06-13 17:06:25
Exelente calidad muy bueno
Mike
2025-06-06 20:51:51
This tester saved me from making a costly mistake. I had ordered a custom emerald pendant with small diamonds all around it. As I checked the diamonds, I found 5 moissanite and 3 white sapphires. I am sure the jeweler was not prepared for me to come in and check the work in front of him. In the one transaction, the tester has already paid for itself as far as I am concerned. Just a way of keeping people honest.
NB
2025-05-06 12:24:56
This unit was very inconsistent when testing on the same stone. We tried cleaning the head and surface of the stone, but the same stone would keep testing as either diamond or moissanite. Sometimes diamonds would test as moissanites and moissanites would test as diamonds. It's disappointing, especially with a product from a well known brand. When dealing with fine jewelry, it's extremely important to be able to identify diamonds and moissanites accurately so we returned this unit.
charles b.
2025-01-06 18:30:37
don't waste your money not worth the price. it's not accurate and Very cheaply made!!!
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