Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants
Condition: New
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Eligible for Return, Refund or Replacement within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 4 left in stock, order soon!
Arrives
Sunday, Aug 24
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Features
- ALL-IN-ONE INSTRUMENT: The worlds first tester that tests for both colorless diamonds and moissanites in a single instrument. Powered by 3 AAA batteries.
- EASY TO USE DESIGN: Ergonomic handheld design with a rubberized anti-slip grip for easy handling. Light and portable with a convenient carrying case.
- THINNEST RETRACTABLE PROBE TIP: Retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industrys thinnest probe tip size of 0.6mm, the PMuT III tests colorless diamonds as small as 0.02ct.
- CLEAR, CONVENIENT DISPLAY: 180-degree multi-viewing LED display for easy readability for either right or left-handed use.
Product Dimensions: 3.4 x 2.4 x 8 inches
Item Weight: 3.42 ounces
Department: womens
Manufacturer: Presidium Instruments LTD
Item model number: PMuT III
Is Discontinued By Manufacturer: No
Dishwasher compatible: No
Batteries required: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 24
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Top Amazon Reviews
Very accurate tester. All my moissanite jewelry came up as moissanite. All my diamond jewelry came up as diamond. Does the job. 5/5
Reviewed in the United States on July 27, 2025 by God
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.
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Reviewed in the United States on July 31, 2024 by me
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.
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Reviewed in the United States on April 8, 2025 by Km2455
Good product, just make sure you center the tip from the diamonds and hold the reader 90 degrees for accurate reading
Reviewed in the United States on January 17, 2025 by RC
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.
Reviewed in the United States on May 29, 2025 by Erika
I had high hopes for the Presidium Multi Tester III as an all-in-one instrument for testing diamonds and moissanites, but it left me thoroughly disappointed. 😞 First off, it's not as user-friendly as it claims to be. The instructions are complex, and it takes forever to get the hang of it. Plus, the device itself is bulky and awkward to handle. But the real letdown is its accuracy—or lack thereof. It frequently gives false readings, leaving me questioning the authenticity of my gemstones. It's a nerve-wracking experience, to say the least. Considering the hefty price tag, I expected much better performance. Unfortunately, the Presidium Multi Tester III doesn't live up to the hype. Don't waste your money on this unreliable gem-testing tool. 💔💎❌
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Reviewed in the United States on September 22, 2023 by Review Expert
I work in a pawnshop and we use these to determine whether or not the stones are diamond moissanite or anything in between they work great
Reviewed in the United States on March 11, 2025 by Jaycob Meinke
The media could not be loaded. 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,
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Reviewed in the United States on August 19, 2023 by norma norma