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5 Best Gemstone Testers of 2026

Last Updated - 2026/04/02

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

PRESIDIUM

Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

PRESIDIUM

CA$508.85

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Main highlights
- VERSATILE AND RELIABLE | Consistent and reliable results every time. Identifies diamonds/moissanites
- THINNEST RETRACTABLE PROBE TIP I PGT II features the industry’s thinnest retractable probe tip
- SIMPLE & EASY TO USE | Clear and easy-to-read analog dial; Can differentiate 16 types of gemstones
- INDUSTRIES MOST TRUSTED | Gemstone tester redesigned to be more compact, sturdy and portable
- INCLUDED ASSISTED THERMAL CALIBRATION | Now easily self calibrate your device to your testing environment
CA$508.85
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Generic

Smart Pro Gem-Eye I Gemstone Tester - Automatic Calibration with Large Screen for Diamond & Jewelry Identification

Generic

CA$384.56

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Main highlights
- Professional-Grade Reliability: Designed for enhanced accuracy and consistency with features like a metal-contact alert to ensure proper testing procedure.
- Precision for Micro-Stones: Equipped with an ultra-thin 0.48mm probe tip, capable of testing stones as small as 0.01 carats.
- Fast Thermal Conductivity Testing: Utilizes thermal conductivity principles to quickly distinguish diamond from common simulants (except moissanite).
- Enhanced Connectivity & Portability: Bluetooth-ready for use with a mobile app and comes as a complete portable kit including a protective case, stone tray, and all accessories.
- Effortless Operation: Features one-touch auto-calibration before each test and a clear, large analog panel display for instant, easy-to-read results.
CA$384.56
3
Best Value

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Mollo

Diamond Tester Pen, 30X 60X Mini LED Magnifying Jewelers Eye Loupe,6PCS Precision Upgraded Anti-Static Stainless Steel Curved of Tweezers Set,Professional Diamond Selector for Novice and Expert

Mollo

CA$32.80

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Main highlights
- ✅💎【Professional Service】Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.Note: Please ensure that the battery temperature is higher than 10 ℃, can not test metal, save power.
- ✅💎【High Quality Stainless Steel&Multifunction】This craft tweezer set is made of high strength stainless steel with anti-static non-magnetic paint on the surface.One set of 6 different specifications and configurations to fit all purposes you need. Excellent for electronics, medical and laboratory work, jewelry and other fine crafts.
- ✅💎【High Accuracy Diamond Tester】This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
- ✅💎【Easy to Use&Intuitive Design】 Real Diamond will Emits sounds and lights >=9.Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.
- ✅💎【30X 60X Mini LED Magnifying&Bright LED】With this dual LED light source, you can clearly see objects in the dark or in low light. The magnifying glass provides a detector for detecting counterfeit banknotes, which is used for banknotes, passports, credit cards and traveler's checks, etc.
CA$32.80
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Molo

Best Version Diamond Tester and 60X LED Magnifying Glasses Jeweler Tool Kit Combo，for Novice and Expert - Diamond Selector 9V Battery Included

Molo

CA$28.80

More Details
Main highlights
- ✔【Simple to Use】Molo 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. To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.
- ✔【Portable】Molo Diamond Tester Pen and 60X LED Lighted Loupe each comes with its own convenient carrying cases. Both items are small and can fit into any purse or backpack. Molo’s Diamond Tester Pen and 60X LED Lighted Loupe combo is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. Alternatively, its also a great tool to have when testing your own jewelry.
- ✔【Intuitive Design】Molo Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights.
- ✔【Fast Results】Molo’s Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds.
- ✔【Application Range】Industrial Purpose, Circuit Board And Printing , Industry, Medicine, Gardening, Coin, Diamond,Stamp, Jewelry, Appraisal, Education, Geography, Home And Office.
CA$28.80
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

GTE

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

GTE

CA$90.59

More Details
Main highlights
- JEWELRY TEST KIT-DIAMOND TESTER-TRIPLET MAGNIFIER
- 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
- ALL-IN-ONE GOLD, SILVER, PLATINUM, & DIAMOND JEWELRY TESTING & APPRAISAL KIT
- A MUST-HAVE FOR ANYONE WHO WANTS TO INVEST IN GOLD, SILVER, PLATINUM, OR DIAMONDS!
- *BONUS* GTE ACID NEUTRALIZER QUICKLY CLEANS STONE
CA$90.59

5 Best Gemstone Testers of 2026

Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

Smart Pro Gem-Eye I Gemstone Tester - Automatic Calibration with Large Screen for Diamond & Jewelry Identification

Diamond Tester Pen, 30X 60X Mini LED Magnifying Jewelers Eye Loupe,6PCS Precision Upgraded Anti-Static Stainless Steel Curved of Tweezers Set,Professional Diamond Selector for Novice and Expert

Best Version Diamond Tester and 60X LED Magnifying Glasses Jeweler Tool Kit Combo，for Novice and Expert - Diamond Selector 9V Battery Included

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

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