Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants

Initially I thought this multi tester was unreliable. Turns out I was the weak link. After reading other reviews and watching the product videos, I realized I wasn’t putting adequate pressure on the stone. After being mindful of the stone cleanliness, probe angle, and pressure, I’m identifying stones with precision. This is a prograde device which does require practice and patience. I’m extremely happy with the purchase.

The Diamond Tester falls short in several key areas, making it a less reliable choice for those needing accurate gemstone assessments. Its performance is inconsistent, often failing to distinguish between diamonds and simulants effectively. This can lead to confusion and potential errors, especially when assessing valuable or delicate stones. The build quality is also lacking, with a flimsy design that feels less durable than expected. Frequent calibration issues can result in unreliable readings, requiring constant adjustments to maintain accuracy. The user interface is not as intuitive as one would hope, making the testing process more cumbersome than necessary. Additionally, the display is small and hard to read, which can be frustrating during detailed examinations. The overall functionality does not justify the investment, particularly when compared to other more reliable and accurate testers on the market. Customer support is reportedly slow to respond, which is a drawback if issues arise. For those serious about gemstone testing, it’s worth considering alternatives that offer better reliability and accuracy. Overall, the Diamond Tester fails to deliver on its promises, making it a less advisable choice for enthusiasts and professionals alike.

Very accurate tester. All my moissanite jewelry came up as moissanite. All my diamond jewelry came up as diamond. Does the job. 5/5

Good product, just make sure you center the tip from the diamonds and hold the reader 90 degrees for accurate reading

Husband wanted me to buy this to keep kin my purse for the "haters" he got me a big diamond ring lol . Works very well everytime def worth the price, not some crappy one u can get.

i was trying to communicate with the support before i give my feedback hoping to resolve my concern, this product is pricey, i was actually expecting this to be solid material not easy to crack, because whe i put the batteries in i notice how easy or crackable it is, and i notice that there is a power input that is not included in the package since its pricey, and when i used it the tip almost cut or broken coz its like softy tip metal, so i check the products manual tru barcode, so the protip is replaceable meaning for this price there should have been extra tip just incase it get damage, i should have chose the lesser pricey one they look the same but i still bought this hoping and expecting this to be worth the money,

Has saved me from sellers with fake gems on Facebook and Ebay numerous times.

Accurate BUT doesn’t last long - at this price point, I should’ve gotten years out of this tool. However, in less than a year of use, the “ready” light just blinks and it never officially turns on. Very disappointing for the $220+ price point. When it did work, it was great. It was easy to use and very easy to carry around with you. I just fully expected it to last longer.