With so many Best Gemstone Tester brands on the market – from prominent names like Presidium,Hqdz-td,GTE,HMKIS,Siziviki to smaller manufacturers – making the right choice can feel overwhelming. But we’re here to help simplify your search for the best product.
We extensively tested and evaluated dozens of top-rated Best Gemstone Tester across various price points, spending over 100 hours comparing the contenders side-by-side. Based on our in-depth first-hand research, we compiled this list of stand-out Best Gemstone Tester to consider. Our top recommendation is Presidium Best Gemstone Tester for its uncompromising quality and performance.
Below you’ll discover more of our favorite Best Gemstone Tester picks. And be sure to consult our buying guide for expert insights on selecting the ideal product for your individual needs and budget. With us guiding your decision, you can shop confidently knowing you’ve chosen an exceptional Best Gemstone Tester you’ll truly love.
Editor's Choice
Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying
Premium Pick
Gemtone All-in-One Gold, Silver, Platinum & Diamond Jewelry Testing and Appraisal Kit with
Budget Pick
Elikliv Coin Microscope, 4.3'' LCD Digital Microscope 1000x, Coin Magnifier with 8 Adjustable LED
Top 10 Best Gemstone Tester
We researched and compared the top products in the Best Gemstone Tester category to provide you with these recommendations.
1. Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying
- INCLUDED ASSISTED THERMAL CALIBRATION | Now easily self calibrate your device to your testing environment
- INDUSTRIES MOST TRUSTED | Gemstone tester redesigned to be more compact, sturdy and portable
- THINNEST RETRACTABLE PROBE TIP I PGT II features the industrys thinnest retractable probe tip
- VERSATILE AND RELIABLE | Consistent and reliable results every time. Identifies diamonds/moissanites
- SIMPLE & EASY TO USE | Clear and easy-to-read analog dial; Can differentiate 16 types of gemstones. IMPORTANT TO NOTE | The calibration of this product may be affected during shipping. If you experience issues with calibration, please reach out to the seller for assistance prior to returning the item.
2. Professional Diamond Tester Pen, High Accuracy Jewelry Diamond Tester, Electronic Diamond Gem Tester
- Easy to use Place the tip of the diamond tester gently on the gemstone. If the diamond is fake, crystalline or cubic zirconia, the tester will not beep. An excellent diamond tester tool kit, suitable for handling any exposed or mounted diamonds and gems. Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.
- Intuitive design Our gemstone tester has an intuitive design, light and portable, and the jewelry diamond tester is equipped with LED lights and audio instructions. As long as the tip is perpendicular to the test masonry and the switch is pressed, the result can be obtained.
- Quick IdentificationYou just turn on our diamond test pen detector; place the tip of the diamond tester on the gemstone, and a single tap is enough. In providing fast and accurate results. You will be able to know in a few seconds whether an item is fake or not.
- Adjust SizeWe have to choose the diamond size before using the diamond tester.Otherwise we may get the incorrect result.
- Touch PanelWe have to touch the panel on the back when testing. Othersize we will get a wrong result.
- Incorrect ContactWhen 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 NoticeThe Diamond Tester Pen works by measuring the thermal conductivity of an object.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.
- Professional Diamond Selector After powering on, turn the wheel to keep 4 green lights on to finish the Initialization. Otherwise you will get inaccurate results.For Diamond SimulantsNo Sound and No Red lamps light on.[Package include]:1 x Diamond Tester Pen, 1X 60XJewelers Loupe,1 x Testing Platform,1 x User Manual,1 x Tweezers.
- Accessory tools Magnifying glass (small microscope) equipped with 60X LED illumination. Diamond test pen can be used for gems, coins, antiques, stamps, reading, inspection, etc. Diamond tester pen is designed for fast, precise and safe diamond testing.
- Professional Service If you have any questions about our diamond tester pen, please contact us. We have a professional dedicated to assisting you and help you answer any questions you may have.
3. Purity Testing Kit for Diamonds Gemstones Moissanites Gold Silver and Platinum Jewelry Electronic
- ALL-IN-ONE GOLD, SILVER, PLATINUM, & DIAMOND JEWELRY TESTING & APPRAISAL KIT
- FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, AND PLATINUM JEWELRY IN SECONDS!
- AUTHENTIC GTE 3''x6'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY
- JEWELRY TEST KIT-DIAMOND TESTER-TRIPLET MAGNIFIER
- A MUST-HAVE FOR ANYONE WHO WANTS TO INVEST IN GOLD, SILVER, PLATINUM, OR DIAMONDS!
- *BONUS* GTE ACID NEUTRALIZER QUICKLY CLEANS STONE
4. 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
5. Diamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Tester Pen
- ACCURATE DETECTION: Our diamond tester pen features a sophisticated sensor system that accurately identifies diamonds, with 5 lights for glass, 5-6 for jade, 5 for cubic zirconia, 7 for gemstone crystal, and 9 for diamonds and moissanite. It's designed to provide clear distinctions for various gemstones, ensuring you get precise results
- STANDARD OPERATION: Insert the battery, power on the gem tester, then preheat the tester for 30 seconds. Adjust the indicator to the fourth mark (Otherwise, inaccurate results may be obtained), press the triangular metal plate at the back with your finger, and position the probe perpendicular to the gemstone. For diamonds, the light will jump to the ninth segment or higher (red light area) and emit beeps. Always reset to the fourth mark before each test.
- METAL DETECTION RESTRICTIONS: The diamond tester is not designed for metal, gold, plastic, fingers type testing. When testing metals, it will emit a rapid beeping sound due to the similarity of the thermal conductivity of the metal to the diamond. It may mimic diamond readings and beep when exposed to high thermal conductivity products. Testing gemstone diamonds only
- PACKAGRE CONTENES: The diamond detector complete set includes a diamond tester pen, user manual, 9V battery and testing platform for your convenience. Before you begin testing, please carefully read the instructions and tips in the user manual to help you achieve the most accurate results from the diamond tester
- PRECAYTIONS: For accurate testing, avoid testing in windy conditions. Position the tip of the diamond tester professional perpendicular to the gemstone for accurate readings, observe the light pattern to determine the stone's authenticity. Always turn off the power after testing to conserve battery life
- SEAMLESS SHOPPING EXPERIENCE: Our dedicated customer service is ready to assist you with any questions you may have about product usage, ensuring you can fully leverage our diamond tester. Note: Only valid for gemstone diamond testingnon-diamond items will cause incorrect readings
- VIDEO GUIDE INCLUDED: For the easiest and clearest visual instructions, watch our step-by-step operation and troubleshooting video in the diamond detector images or description section
6. Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for
- NOTE: The calibration may be affected during shipping. If you have issues, reach out to the seller.
- INDUSTRIES MOST TRUSTED gemstone tester redesigned to be more compact, sturdy and portable.
- THINNEST RETRACTABLE PROBE TIP: PGT II features the industrys thinnest retractable probe tip.
- VERSATILE AND RELIABLE: Consistent and reliable results every time. Identifies diamonds/moissanites.
- SIMPLE & EASY TO USE: Clear and easy-to-read analog dial; Can differentiate 16 types of gemstones.
7. Elikliv Coin Microscope, 4.3'' LCD Digital Microscope 1000x, Coin Magnifier with 8 Adjustable LED
- Black Base for Enhanced Imaging: This microscope for adults features a black base which is specifically designed to minimize light reflection, significantly enhancing image clarity and providing you with sharper and more detailed observations
- 4.3'' 720P Display: This coin scope delivers crisp real-time images and high quality videos in well-lit conditions with eight LED lights; The large screen is ergonomically designed to reduce eye and neck strain, offering a more comfortable viewing experience
- Powerful Magnification: Zoom in to see incredible details with magnification ranging from 50 times to 1000 times; Allows to accurately authenticate and examine details of coins, stamps, and antiques; Helping to ensure and enhance the value of your collection
- Microscope to PC Larger View: Connect this electronic microscope effortlessly to Windows or MacBook for viewing on a larger scale, and share live images with multiple viewers; Also easily saving and organizing your images or videos for better analysis
- Enhanced Viewing with LED Lighting: This handheld microscope features 8 adjustable LED lights that provide optimal illumination, ensuring clear and detailed observations even in low-light conditions, and improving image quality for precise analysis
- Also Great for Kids STEM Education: This mind-stimulating microscope sparks curiosity and interest in science by allowing kids to explore the microscopic world; And it enhances hands-on learning, making complex scientific concepts easier to understand
- Height-Adjustable Stand: Allows adjustment of camera-to-object distance for varying magnification needs; Provides extra flexibility and comfort as you can easily find the perfect viewing angle and achieve precise focus for clearer images
- Built-in Rechargeable Battery: Offers up to three hours of continuous use, this digital microscope ensures portability and extended operation; Perfect for both indoor and outdoor exploration
- Photo and Video Capabilities: Capture and store photos or videos for later viewing. Memory card is required based on your needs (The package does not include SD card)
- Widely Used, Great Christmas Gift: Suitable for circuit board inspection, coins, jewelry, and stamps, watch, clock repair, skin detection, kids STEM education, textile industrial, QC inspection and more
8. Portable Gem Tester, Gemstone Tester with LED Indicator Light & Touch Screen, Accurate Test and Easy
- Automatic Test FunctionExperience cuttingedge technology with a built-in LED light source that requires no warm-up time. The top box can be opened to match gemstones of different sizesMaking it the ideal Portable Gem Tester for onthego evaluations
- Quick ResultsEngineered for speed and accuracy, our tester delivers reliable results in seconds. Its compact design ensures that you can swiftly verify authenticity anytime, anywhere, serving as a topquality Gemstone Tester
- Optimal EfficiencyDesigned with an intuitive pointer interface, this device maximizes your productivity by allowing fast and efficient testing. Its streamlined performance makes it the ultimate Gemstone Tester for All Stones
- Easy To UseNo professional skills are neededjust power on the device, gently press the tip against the stone, and get instant feedback. Its user-friendly operation ensures accuracy with every test
- Versatile ApplicationsNot limited to diamonds alone, this tester is perfect for assessing a wide range of gemstones. Whether youre a professional jeweler or a hobbyist, it offers various functionalities to meet your diverse testing needs
9. Valkynos Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s
- After-Sales Service: 30-day unconditional return or exchange. For any issues or battery replacement (same type available in the U.S.), please contact us
- Fast & Accurate Diamond VerificationThe high-accuracy diamond tester pen has advanced thermal conductivity; this tester accurately distinguishes real diamonds from common fakes like crystal or cubic zirconia. Ideal for home use, collectors, or resellers
- Built-in UV Light for Fluorescence DetectionDiamond tester professional features a built-in UV light to reveal diamond fluorescencean important clue in verifying authenticity. Different materials show different reactions under UV, making this feature useful for deeper assessment
- Real-Time Feedback with LED Lights & SoundsAfter a 25-second warm-up, hold the conductive panel on the top with your finger, tip the vertical diamond 90 degrees: a red LED flashes and a buzzer sounds when a real diamond is detected
- Testing Tips for Best Accuracy Use with bare hands (avoid gloves) Best results at room temperature (1035C) Accurate for diamonds 0.02 carats and larger
- Compact & Ready for TravelDiamond tester pen compact size with protective case makes it easy to keep in your bag or drawer, leather pouch keeps your tester safe perfect for on-the-spot diamond checks at home, in stores, or while traveling.
10. Gemtone All-in-One Gold, Silver, Platinum & Diamond Jewelry Testing and Appraisal Kit with
- Complete Testing Kit Includes jewelry test solutions, digital scale, diamond tester, touchstone, magnifier, files, and reference bars for evaluating gold, silver, platinum, and diamonds.
- Digital Scale Compact stainless-steel platform with 0.01 g accuracy, weighing modes for g/oz/dwt/ozt/ct/gn, and up to 100 g capacity.
- Larger 15 ml Bottles Each test solution bottle is 0.5 oz (15 ml), three times larger than many common 5 ml bottles available, providing more tests per bottle.
- Diamond Tester & Accessories Portable electronic tester with included sizing gauge and estimator for distinguishing diamonds from common simulants.
- Magnifier & Files 30X triplet loupe for inspecting fine details and a 10-piece diamond needle file set for preparing samples.
- Reference Bars Included Practice with a 5 gn silver bar and a 5 gm gold-plated bar to become familiar with testing reactions.
- Neutralizer solution for cleaning test stone between use
Peter
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