Best Diamond Tester On The Market

Peter | 26-12-2025

If you aren’t someone who makes frequent purchases, selecting the best Best Diamond Tester On The Market won’t be an easy chore for you. However, you shouldn’t be concerned because we have provided you with the most comprehensive list possible of the top Best Diamond Tester On The Market. Have a look at the products on our list, and pick the ones that appeal to you the most.

We researched and tested Best Diamond Tester On The Market in the market to get you this list. Our most recommended product is HMKIS Best Diamond Tester On The Market. Check out our picks for all of our favorites, and be sure to read our buying guide to get all the information you need to make the best choice!

Editor's Choice
HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier,
HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier,
Premium Pick
Presidium Duo Tester PDT Diamond Gemstone Tester
Presidium Duo Tester PDT Diamond Gemstone Tester
Budget Pick
Diamond Tester Pen – Portable Jewelry Diamond Testers for Real and Fake Gemstones – Professional
Diamond Tester Pen – Portable Jewelry Diamond Testers for Real and Fake Gemstones – Professional

Top 10 Best Diamond Tester On The Market

We researched and compared the top products in the Best Diamond Tester On The Market category to provide you with these recommendations.

1. HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier,

  • [Power Upgrade] The HMKIS diamond tester offers two power supply options: Type-C and 9V Power (includes a 1m Type-C cable). Utilizing a Type-C power supply delivers a more stable and precise voltage output, thereby enhancing the accuracy and reliability of experimental and test results. Opting for the Type-C power supply is highly recommended for optimal performance. PLZ NOTE THIS IS Non-Rechargeable !
  • [Rapid Assurance] The Professional Diamond Selector II swiftly verifies the authenticity of diamonds with precise accuracy. Designed for quick and secure testing, this diamond selector features an LCD display, LED indicator, and large/small switches for testing diamonds. Audible signals provide further assistance in interpreting readings, ensuring a swift and confident evaluation process.
  • [Easy Use]The HMKIS Diamond Tester Pen is a user-friendly tool that eliminates the need for professional knowledge in diamond testing. With just a few simple steps, anyone can determine the authenticity of a diamond. By turning on the Diamond Tester Pen detector, selecting the diamond size, and placing the tip of the tester on the gemstone, users can easily identify whether the stone is a genuine diamond or if it is made of glass, crystal, or cubic zirconia based on the results. The red light and beep emitted by the diamond tester indicate the presence of a diamond, making it a convenient and easy-to-use tool for anyone in need of quick and accurate diamond testing.
  • [Jewelers Loupe] The 60X LED Jewelers Loupe with batteries is a versatile tool that can be used for a wide range of applications. Whether you are examining gems, coins, antiques, stamps, conducting readings, inspections, jewelry appraisals, studying rocks, watches, calligraphy, paintings, pursuing hobbies, collecting antiques, building models, working in the photo industry, testing electronic products, or simply using it for tasks in your home life or office, this Jewelers Loupe is an essential tool. Its compact design and powerful LED lights make it convenient for use in various settings, providing clear and detailed magnification for all your viewing needs.
  • [Adjust Size]:We have to choose the diamond size before using the diamond tester.Otherwise we may get the incorrect result.
  • [Touch Panel]: We have to touch the panel on the back when testing. Othersize we will get a wrong result.
  • [Incorrect Contact]: When we have incorrect contact, this diamond tester pen will have a flashing OR it will turn off. When you testing metal,skin,or something else.
  • [Warm Notice]:Make sure to test according to the correct testing procedure, avoid using the diamond tester on unsuitable items(metal,skin,water and ect.), to ensure accurate testing results. Any improper operation may affect the accuracy of the test.
  • [Package include]:1 x Diamond Tester Pen, 1X 60XJewelers Loupe,1x 1M USB Cabel,1 x Testing Platform,1 x User Manual

2. Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for

  • [Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.
  • [Bare Hands Operation]:All the tests must be done by your bare hands. If you put on your gloves, the metal alert will not function since a normal moisture levelof your hands is necessary for operation.All test must be done by TWO hands, one for hold the diamond and one for the diamond tester. As for the hand which hold diamond tester, you have to touch the electricity conductive panel on the back of the unit.If you test the diamond just by one hand, you will get a wrong result.
  • [Beeping Upon Startup]:Ensure correct installation and adequate power in the test pen battery. Also, clean the test pen probe as maintaining its cleanliness can enhance testing efficacy.A beeping sound upon powering on signifies the need for initialization settings. Consult the table on the rear of the machine for the specific initialization settings considering the diamond's temperature and size. Adjust the initial number of illuminated lights by rotating the knob (the default setting is to have 4 lights illuminated at room temperature).
  • [High-Frequency Sound when Testing Metal]:The high-frequency sound during metal testing is due to the test pen's operational principle, which relies on thermal conductivity to distinguish between diamonds and fake gemstones. Since metal possesses thermal conductivity similar to diamonds, it generates a high-frequency sound during testing.
  • [Simple to Use]:Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.
  • [ Note]: The battery temperature is lower than 10 degrees Celsius, which seriously affects the use time Don't wear glovesDon't detect metal Best to measure in no wind conditionsThe operating temperature is within the range of 10-35 degrees Celsius, and the humidity is below 80% When testing diamond, your right index finger must keep touching the metal panel on the back of the tester. Please turn off the power after the test to save power.
  • [Package include]:Diamond tester is battery powered for convenience.Requires 1 standard 9v battery, which is included.Package include:1 x Diamond Tester,1 x Leather Pouch Case,1 x Testing Platform,1 x User Manual,1 x DC 9V battery.

3. Presidium Duo Tester PDT Diamond Gemstone Tester

Presidium Duo Tester PDT Diamond Gemstone Tester
9.1

Presidium

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  • Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone
  • Industrys thinnest probe tip (0.6mm) for testing gemstones as small as 0.02ct
  • Large easy to read analog dial with 15 colored gemstones
  • Consistent and reliable results every time
  • Simple and easy to use

4. Diamond Tester Pen – Portable Jewelry Diamond Testers for Real and Fake Gemstones – Professional

  • Size of Diamond Stone Testers: The gemstone tester pen diamond gold tester has size about 6.6 inches length and width about 1.6 inches with thickness about 0.8 inches. The portable diamond detective kit tool is lightweight and durable for years of use. This jewelry diamond tester comes with a practical carrying case so they are very convenient for replacing on place to another
  • Detection Way: These diamond detector tester jewelry tools indicates genuine diamond or fake very easily. This black diamond tester pen is designed and manufactured according to the thermal conductivity of diamond and the fake crystal such as cubic zirconia does not have any reaction. So in this way, you can perfectly treat heavy metals, gold, diamond and silver jewelry
  • Result Indicator of Diamond Checker Tool: With diamond gem stone tester you will be able to know in a few seconds whether an item is fake or not, there are the LED indicator and the audible signal a red light will be displayed and an audible indicator will sound if the gemstone is a real diamond
  • Easy to Operate Diamond Tester Tool: Simple calibration for stones of gemstone tester for all stones are easy to use even for a new beginner. This fake diamonds and gold tester for jewelry is also a great jewelry tool to have when testing your own jewelry. Just turn it on, lightly press the tip to the gemstone and wait for the beep to know if it is real or fake
  • Wide Use: This diamond tester makes a thoughtful Christmas gift for Holidays. Used for industrial purposes such as heavy metal testing, its a good present for anyone with a passion for precision

5. HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier,

  • [Power Upgrade] The HMKIS diamond tester offers two power supply options: Type-C and 9V Power (includes a 1m Type-C cable). Utilizing a Type-C power supply delivers a more stable and precise voltage output, thereby enhancing the accuracy and reliability of experimental and test results. Opting for the Type-C power supply is highly recommended for optimal performance. PLZ NOTE THIS IS Non-Rechargeable
  • [Easy Use] By turning on the Diamond Tester Pen detector, selecting the diamond size, and placing the tip of the tester on the gemstone, users can easily identify whether the stone is a genuine diamond or if it is made of glass, crystal, or cubic zirconia based on the results. The red light and beep emitted by the diamond tester indicate the presence of a diamond, making it a convenient and easy-to-use tool for anyone in need of quick and accurate diamond testing.
  • [Jewelers Loupe] The 60X LED Jewelers Loupe with batteries is a versatile tool that can be used for a wide range of applications. Whether you are examining gems, coins, antiques, stamps, conducting readings, inspections, jewelry appraisals, studying rocks, watches, calligraphy, paintings, pursuing hobbies.
  • [Adjust Size]:We have to choose the diamond size before using the diamond tester.Otherwise we may get the incorrect result.
  • [Incorrect Contact]: When we have incorrect contact, this diamond tester pen will have a flashing OR it will turn off. When you testing metal,skin,or something else.

6. Crystalopoly Diamond Tester 2 Kit – High Precision Jewelry Testing Device with Moissanite Sample,

Crystalopoly Diamond Tester 2 Kit – High Precision Jewelry Testing Device with Moissanite Sample,
8.5

Crystalopoly

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  • Complete Diamond Testing Kit Includes precision diamond tester, real moissanite sample, and easy instructions for reliable testing.
  • Test Accuracy with Real Moissanite Use the included stone to verify your tester can detect moissanite vs. real diamonds.
  • Fast & Clear Results Easy-to-read display instantly shows if a stone is real or fake.
  • Train & Learn Moissanite sample helps you learn how different stones react.
  • For Jewelers & Collectors Perfect for resale, appraisal, or personal collection checks.

7. Diamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional

Diamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional
8.3

Hqdz-td

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  • Diamond Detection: Effortlessly distinguish real diamonds from other stones using the diamond indicator, which emits a green light when a real diamond is detected.
  • Professional Diamond Selector will indicate genuine diamond or fake,LCD display & LED indicator.Portable electronic device for distinguishing real diamonds from other simulated stones.
  • It is designed for quick, precise, and safe diamond testing.Emits audible sounds to easily differentiate the readings.If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction.
  • User-Friendly Design: Features a large/small switch for testing diamonds and -8 points, an LCD display, and an LED indicator, making it easy to use for both novice and expert jewelers.
  • Comprehensive Test Result Analysis: With various test result indicators, this diamond tester pen can identify real diamonds, crystals, jade, glass, and even alert you when accidentally touching metal.
  • Complete Package: Comes with a leather pouch case, testing platform, and user manual, providing you with everything you need to start testing your diamonds with confidence.

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

Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and
8

Presidium

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  • 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.

9. Deluxe Jeweler's Diamond & Gemstone Analyzer Tester for Diamonds Moissanites Stones Lab-Created

Deluxe Jeweler's Diamond & Gemstone Analyzer Tester for Diamonds Moissanites Stones Lab-Created
7.9

Gemtone

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  • Diamond Identification Helps distinguish natural diamonds from common simulants such as moissanite and cubic zirconia by measuring heat conductivity.
  • Easy-to-Read Display LCD screen with LED indicators provides clear, quick results.
  • Portable & Convenient Compact, lightweight design with included leather carrying case for safe storage and travel.
  • Battery powered: Operates on a single DC 9V battery (included), ensuring hassle-free testing wherever you go.
  • Comprehensive package: Comes with a leather carrying case and Diamond Weight Estimator and Gauge, allowing you to estimate stone sizes with precision.

10. Professional Diamond Tester Rechargeable,High Accuracy Jewelry Diamond Tester Pen,Electronic Diamond

Professional Diamond Tester Rechargeable,High Accuracy Jewelry Diamond Tester Pen,Electronic Diamond
7.7

Hqdz-td

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  • Intuitive Design Quick and Safe - Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results. 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. Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.
  • Effortless Testing - Key operation, at a glance.No need for a professional - the Hqdz-td 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 Diamond.The 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).
  • Key operation,Simple to Usem - Please put the pen tip vertically and gently on the test stone.Please adjust according to the size of the stone to be measured. Instrument up/down button, according to the number of carats displayed below the instrument adjustment, you do not need to set the exact number of carats.But remember, for diamonds (greater than 1.0 carats), please turn on 1 green light; For diamonds (0.5 carats), turn on 2 green lights. For small gems (such as cuts or cones), turn on 3-4 green lights. (Please pay special attention not to touch the keys on the instrument during testing)
  • High-Frequency Sound when Testing Metal -The high-frequency sound during metal testing is due to the test pen's operational principle, which relies on thermal conductivity to distinguish between diamonds and fake gemstones. Since metal possesses thermal conductivity similar to diamonds, it generates a high-frequency sound during testing.[Warm Notice]:Make sure to test according to the correct testing procedure, avoid using the diamond tester on unsuitable items(metal,skin,water and ect.), to ensure accurate testing results. Any improper operation may affect the accuracy of the test.
  • Easy to use - [Adjust Size]:We have to choose the diamond size before using the diamond tester.Otherwise we may get the incorrect result.[Bare Hands Operation Touch Panel]: We have to touch the panel on the back when testing. Othersize we will get a wrong result.[Incorrect Contact]: When we have incorrect contact, this diamond tester pen will have a flashing OR it will turn off. When you testing metal,skin,or something else.
  • [Package include]:1 x Diamond Tester Pen, 1x 1M USB Cabel,1 x Testing Platform,1 x User Manual.Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.

Peter

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