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Your cart is empty.Product Description
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Metal Probe
Take off the Probe cover
Hold the Probe vertically against the diamond
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Level Measurement
real: 9 or more lights will turn on
fake: fewer than 9 lights
incorrect contact: lights will flash
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Select Size
Use “— ”, “+” to set size
≥ 1.0 ct, turn on 1 green light; = 0.5 ct, 2 light ; < 0.5 ct, 3-4 light
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UV Light
Hold the UV, activate the UV light and check the diamond’s fluorescence and cut for authenticity
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USB Power
Equipped with rechargeable battery, reusable
Steps To Use A Diamond Test Pen
1. Remove the pen cover
2. Press the power switch, preheat for one minute, and start the test after the light flashes
3. Select the diamond size. The wrong size will result in an incorrect result
4. You must touch the panel on the back during the test
5. Keep the test at a vertical angle to the diamond
6.Real diamonds will light up more than 9 lights and make a clear sound
Fake diamonds will light up less than 9 lights and will not make a clear sound
7. Use a Changan UV lamp to observe the cut surface of the diamond under ultraviolet light. Real diamonds usually have blue fluorescence
8. Note that the probe should only touch the diamond gemstone, not metal or skin, to avoid incorrect results
Diamond Testing Reaction Of Different Materials
Stevie
Reviewed in the United States on May 27, 2025
This is an impressive tool that is easy to carry around and works really well. First and foremost, its high accuracy makes it a reliable choice for anyone dealing with jewelry. It is also really easy to use and read. The LCD display provides clear results. Regardless of if you are a beginner or an expert, anyone can use this and get accurate results without confusion.Additionally, there is a built-in UV light which enhances its functionality by helping identify certain characteristics in diamonds, such as fluorescence, which is something many buyers look for. It also aids in recognizing other gemstones, adding to its versatility. I love that it is rechargeable. because I never have to worry about burning through batteries, plus it uses the standard c-charge so there is not a time when I don't have a charging cord available.
Creative professional
Reviewed in the United States on May 24, 2025
It's a little fiddly to set the stone size which is why it gets 4 stars instead of 5. It might be a button responsiveness issue, not sure. Other than that, it's pretty straightforward. I tried it on multiple stones that are known diamonds, known moissanites, and some white sapphires and CZs. It correctly identified the diamonds and moissanites as diamond/moissanite and for the CZs, it didn't register anything at all. The White sapphires popped up on the scale but did not alert as diamond/moissanite.It's a little awkward to hold the conductor plate just so for getting some of the smaller stones read correctly, but I think it will just take practice. I like that it's rechargeable instead of needing batteries and it comes with the necessary charging cable.I would say for the price, it's a good value. I am not sure I would be comfortable buying large/expensive stones based solely on the testing of this device until I have had more time to use it and get comfortable with the readings.
Toutenhaut
Reviewed in the United States on May 22, 2025
I tested the unit received on my wife's treasures, and obtained the results I expected.Having previously read the other Vine reviews (which are excellent), my expectations were perhaps more grounded in reality than they would have been otherwise, hence I am giving this little tool full marks.The only thing that was somewhat confusing to me is how to set the size of the gem to be tested. Using the "+" button to increase the number of lit diodes DECREASED the size setting (if I understood the instructions correctly), while pushing the "-" button to reduce the number of lit diodes actually INCREASED the size of the stone. It's a little counter-intuitive, but not a fatal issue.
DudeMeToo
Reviewed in the United States on May 22, 2025
The Valkynos Rechargeable Diamond Tester Pen offers a solid build and helpful features like a clear readout, UV light, and rechargeable battery. It works well for identifying whether a gemstone is real or not, especially with basic thermal conductivity checks. However, it can't distinguish between diamonds and Moissanite, and the accuracy can vary depending on technique and stone size. It's useful for general verification, but not ideal if you're looking for high-precision results or something completely beginner-friendly. The startup time is also a bit long, which could be inconvenient in fast-paced environments.
Customer
Reviewed in the United States on May 21, 2025
Bought this to test some pieces I had that I wasn’t sure about. For an initial test I tested my wedding set, which I knew to be diamonds, and a stone I knew to be Cubic Zirconia and it tested both accurately.
Chad R
Reviewed in the United States on May 21, 2025
This my first tester like this that ive ever used so I don't have anything to compare it to but this works great. I tested it out on moissanite and diamonds just to see what it would do and you could definitely easily tell the difference between the two and then I tried it on some CZ and it didn't react at all. So I'm happy with it and it will come in handy in the future
mom2three
Reviewed in the United States on May 20, 2025
I watched videos, read instructions and followed everything to a tee. Not one time did this register anything as a diamond, even known authenticated diamonds from multiple sources. I made sure everything was completely clean and diamonds I know to be authentic barely registered on the meter. Garbage, sending back
James Minor
Reviewed in the United States on May 12, 2025
It’s doesn’t work all that great
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