Top 10 Best testers in 2026

Last Updated - 6/10/2026

🏆Best Choice

BYASKZIV

BYASKZIV Ultrasonic Jewelry Cleaner, 48KHz Ultrasonic Cleaner Machine for Jewelry, Eyeglasses, Rings, Watch Strap, Dentures- Dual Cleaning Modes, 304 Stainless Steel Tank

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Professional Ultrasonic Jewelry Cleaner: The ultrasonic cleaning machine only requires tap water to clean dirty jewelry within minutes, without removing tarnish (adding ultrasonic cleaning agent solution can achieve better cleaning results)
•Multifunctional Jewelry Cleaner: The ultrasonic cleaning machine uses 48,000Hz high-frequency sound waves to clean items. Can be used to clean Eyeglasses, jewelry, dentures, watch coins, etc., without damaging delicate items
•Convenient to Use: The ultrasonic cleaner has two cleaning modes. Simply touch the power button, it will automatically clean items for 5 minutes, for watch strap or dirty object, it is suggested to use the mode of 7 minutes. The bottom is equipped with four non-slip rubber pads, making it easy to stabilize the ultrasonic cleaner, effectively reducing noise, for a more reassuring use
•Capacity and Portability: The capacity of sonic cleaner is 12oz, suitable for most kinds of eyeglasses and jewelry. The SUS 304 stainless steel tank has excellent corrosion resistance
•Package Contents: 1*ultrasonic jewelry cleaning machine, 1*watch stand, and 1*user manual. If you have any questions about this eyeglass cleaner, we offer a 12-month warranty and 100% satisfaction guarantee for this silver cleaner

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$39.99

$42.99

-7%

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NIUPIKA

NIUPIKA Ring Sizer Measuring Tool Ring Mandrel Ring Measurer Ring Sizing Kit Measure Finger Size Measurement Tool Set Metal Gauge US Size 1-13 Jewelry Sizers Kit of 27 Pieces

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Ring sizer mandrel is made of aluminium. The 27 Pc ring measurer and ring sizer gauge set is made of stainless steel.
•Ring sizer mandrel gauge set measure with US sizes of 1-15 and European sizes of 41-76, ring sizing kit can easy to know correct size you need.
•Ring sizer gauge set has 27 Pieces, ring size from 0 up to 13, with 1/2 sizes between each one(no quarter sizes)
•Package Included：1 * ring sizer mandrel; 1 * ring sizer guage
•Ring size measuring tool is lightweight and easy to handle,often used in the production of jewelry rings, wedding rings can also be scheduled through this tool

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$8.99

$10.99

-18%

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HMKIS

HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•[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

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$16.99

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WELLZEER

WELLZEER Keychain Magnet for Testing Brass,Keychain Pocket Magnets for Purse with Strong Magnetic Rare Earth Neodymium,Gold,Silver, Jewelry,Ferrous Metals Test Magnet (2PACK-D12mm)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•✅ Premium quality brass test magnet for jewelry dealers, metal recyclers, brokers, antique buyers and collectors! WELLZEER Keychain magnet is also very convenient and easy-to-carry to test for iron, nickel, or cobalt content.
•✅ Identify fake/plated jewelry, where steel or nickel alloys is often the base matal.
•✅ Identify/sort chrome plated items from silver, polished aluminum, and non-magnetic grades of stainless steel.
•✅ Identify and sort solid brass and bronze from steel-plated items.
•✅ Size: 0.47" x 1.57 " Package: 2 pack/box. Pull power: 3 pounds. Super strong metal magnet keychain split ring pocket keyring hanging holder.

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$6.99

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GTE

Gold Silver Jewelry Tester Appraisal Kit 10K 14K 18K 22K 24K Test Precious Metals 999 925 Scrap

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•ALL-IN-ONE GOLD AND SILVER TESTING & APPRAISAL KIT
•FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD AND SILVER JEWELRY IN SECONDS!
•2 AUTHENTIC *LARGE* GTE 2''x 4'' JEWELRY TOUCHSTONES FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY
•*BONUS* GTE NEUTRALIZER QUICKLY CLEANS STONE
•A MUST-HAVE FOR ANYONE WHO WANTS TO INVEST IN GOLD AND SILVER

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$31.95

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GTE

Jewelry Testing Kit 10K, 14K, 18K, 24K Gold, Silver, Platinum Test Solutions with Scratch Stone, 30X Loupe, Instructions, and Bamboo Storage Box

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•GOLD, SILVER, AND PLATINUM JEWELRY TEST KIT
•HANDCRAFTED WOOD STORAGE BOX TO PROTECT AND PROLONG TESTING SOLUTIONS
•AUTHENTIC GTE 2''x 2'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY
•A MUST-HAVE for anyone who invests in gold, silver, or platinum!
•FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, AND PLATINUM JEWELRY IN SECONDS!

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$39.97

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GTE

Gold Silver Jewelry Tester Appraisal Kit 10K 14K 18K 22K 24K Platinum Palladium Test Precious Metals 999 925 Scrap

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, & PLATINUM JEWELRY IN SECONDS!
•ALL-IN-ONE GOLD, SILVER, PLATINUM TESTING & APPRAISAL KIT
•2 AUTHENTIC *LARGE* GTE 2''x 4'' JEWELRY TOUCHSTONES FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY
•*BONUS* GTE ACID NEUTRALIZER QUICKLY CLEANS STONE
•A MUST-HAVE FOR ANYONE WHO WANTS TO INVEST IN GOLD, SILVER, & PLATINUM

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$35.95

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Siziviki

Diamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Tester Pen Professional (Metal Detection Limitation)

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•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
•EASY 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 testing—non-diamond items will cause incorrect readings

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$11.99

$12.99

-8%

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GTE

Purity Testing Kit for Diamonds Gemstones Moissanites Gold Silver and Platinum Jewelry Electronic Digital Diamond Tester Machine JSP GTE

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•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

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$39.95

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Syyflibb

Syyflibb 2PCS Jewelry Cleaning Cloth, Silver Polishing Cloth Jewelry,2 PCS Ultra-Soft Brushes (Flat & Wave) for Cleaning Gold, Diamonds, Platinum, Gemstones, Coins (Black and Gray)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•🔹 Dual-Action Silver Polishing Cloths; Includes 1 black (pre-polish) & 1 grey (final shine) cloths to remove tarnish from silver jewellery, coins and cutlery without harsh chemicals.
•🔹 2 Specialty Soft Brushes for Delicate Cleaning; Flat-top brush cleans wide surfaces, wave-tip brush reaches chain links/engravings. 0.1mm nylon bristles prevent scratching gold plating or gemstones.
•🔹 Safe for Sterling Silver, Gold & Costume Jewellery; pH-neutral materials protect rhodium plating and soft metals. Ideal for rings, necklaces, bracelets and earrings.
•🔹 Compact & Reusable Design; Storage pouch keeps cloths moisturized between uses. Brushes last 200+ cleans (Lab tested).
•🔹 Widely Used ; Pure silver cleaning cloth can be used to wipe jewelry such as necklaces, bracelets, watches, rings, earrings, etc. It is suitable for gold, silver, platinum, gemstones, stainless steel, etc.

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$6.32

$6.99

-10%

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