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StillCool

StillCool Diamond Tester, High Accuracy Diamond Tester Pen, Diamond Tester Professional, Diamond Detector Gem Tester Gemstone Gemstone Tester

    • Based on 2,499 reviews
Condition: New
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$14.99 Why this price?
Save $7.00 was $21.99

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As low as $3 / mo
  • – 4-month term
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This item is eligible for return 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.

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Nov 27
Order within 14 hours and 37 minutes
Available payment plans shown during checkout

Features

  • Intuitive Design Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results.
  • Effortless Testing No need for a professional - the StillCool Diamond Tester Pen is easy to operate. Just turn it on, lightly press the tip to the gemstone, and wait for the beep to know if it's real or fake.
  • If it's Real DiamondThe professional Diamond Tester will lighted up over 9 and emits audible sounds. No reaction means the stone is a fake crystal or simulant like cubic zirconium (CZ).
  • Quick and Safe Designed for quick, precise, and safe diamond testing, this diamond selector tester ensures that there is no harm to diamonds during the testing process. providing accurate results every time.
  • Convenient Package The Diamond Tester is battery-powered by a standard 9v battery (not included), and the package comes with a leather pouch case, testing platform, user manual and accurate diamond tester pen.

Brand: StillCool


Power Source: Battery Powered


Style: Electronic


Color: Diamond Tester - Black


Package Dimensions: 7.28 x 2.2 x 1.42 inches


Item Weight: 3.84 ounces


Item model number: STE13420001


Is Discontinued By Manufacturer: No


Date First Available: February 16, 2017


Manufacturer: StillCool


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 27

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • works great if you use it correctly
Color: Diamond Tester - Black
i have had five diferent kind of diamond testers ALL of them work great if you use them correctly there not hard to use but people dont read how to use them its not" rocket surgery"
Reviewed in the United States on February 10, 2024 by HILLBILLY GIRL
    • Diamond Tester...
Color: Diamond Tester - Black
I didn't receive anything that told me specifically how to use this, however it wasn't too difficult tune it in and then test it on a diamond you'll get the hang of it.
Reviewed in the United States on February 29, 2024 by Sonar
    • I'm having no troubles with it
I received a few days ago and put it through some tests. I have some (quite a lot) of antique rings, most with stones that I wanted to check... honestly, I wanted to get an idea of which were garnets and which were rubies. Turned it on and waited for it to warm up, looked at the back to see what the calibration rates were and to calculate C to F. It's much easier to test jewelry with the tester by holding it in your hand, and make sure to keep a finger on the metal pad on the back. I found that with diamonds the testing was the quickest, the bars just shot right up the tool; testing other stones took a little bit longer for me as sometimes there was a pause before an extra bar showed up. I tested diamond chips and various sizes ranging from .05 to a .25c old European cut , everyone tested as a diamond... I have one piece of paste on a pin that I also tested, no movement whatsoever. Another thing I noticed was that it didn't matter if I had the calibration set for a larger stone (2 bars) when I tested diamonds, they shot all the way up regardless. It does matter if you are testing gems that aren't diamonds though. After that I moved on to the sapphires, I have white/blue synthetics, a couple of star sapphires, a natural white and a 1ct blue... all tested with 4 bars added to the calibration (not sure what would have happened if I had a really small one though and used the 8 bar to begin with). I also tested a stone that I thought was glass that I had on a great looking 10k ring. This stone was really dull and ugly, and around 1/3c... calibrated the tool at 4 bars and to my amazement it went up 4 bars. After soaking the ring in a glass of warm soapy water and then cleaning it with a toothbrush, I was excited to see how much it sparkled, no fire but certainly a beautiful stone and comparable to my natural white sapphire. I also tested a few loose small stones I have and found that it was almost easier to test them while holding rather than using the stone holder. On to the rest of what I found: When testing , Rubies +4, Sapphires +4, Amethyst +2, Emeralds & Garnets +1 (Members of the Beryl family have a very wide range of conductivity, so your results could be different depending on origin) Opal +0, {onyx, tigereye, agate, bloodstone, carnelian, moonstone} +1, Hematite +2. I also found one or two stones that I still can't identify but definitely narrowed down what they might be, found out that the purple stones in a turn of the century carved gypsy setting were pyrope garnets rather than the amethysts I thought and realized that two of the lower end rings I thought had glass/paste actually had gems on the lower end of the range. I will also add that just as this diamond/gem tester won't differentiate between mined diamonds and lab-created diamonds, it gives the same +4 on the mined rubies in my Edwardian jewelry as the synthetic ruby of a 1950's ring. All in all I like it a lot, although it can be a bit cumbersome at times. The cap fits on it well and keeps the tip protected along with the case. Just keep an eye on where the bars are after each test because sometimes you may have to adjust it back down a tad. I was usually testing the non-diamond gemstones a couple of times due to a slower bar time. I'll update further on the longevity. ... show more
Reviewed in the United States on May 20, 2021 by Ivan's girl
    • Diamond tester user error
Color: Diamond Tester - Black
It did not seem to work. I was going to return it until I read someone’s comment about removing the black protective tip. Once air removed the black tip cover it worked as it should. Maybe put mention of this in the paperwork as the tip cover looked to be part of the tip itself.
Reviewed in the United States on December 21, 2022 by Gift shopper PB
    • Not worth it
Color: Diamond Tester - Black
This us cheap and a waste of money . The battery cover is hard to open and once battery is in its hard to take out and put back in . That struggle alone is enough but it is also cheaply made with plastic .
Reviewed in the United States on February 11, 2024 by leah peterson
    • Not the Best!
Color: Diamond Tester - Black
You get what you pay for with this product! All it does is recognize Diamond no gems. It also recognizes Moissanite that’s it Not what I expected!
Reviewed in the United States on September 27, 2023 by Keith clark
    • Easy to use
Color: Diamond Tester - Black
Easy to use diamond tester.
Reviewed in the United States on January 4, 2024 by PK
    • Works!
Color: Diamond Tester - Black
This is great! Cleaned up old jewelry left to me and found a diamond ring in the mix! Use as directed. Must be straight when pressed on the diamond.
Reviewed in the United States on January 13, 2024 by S.M.

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