Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Advertising Disclosure
10 Best diamond gold testers of 2026
Explore top picks
Best Choice1
GTEGold Silver Platinum Diamond Jewelry Tester Appraisal Kit 10K 14K 18K 22K 24K Electronic Scale Test 30X Eye Loupe Magnifier Precious Metals 999 925 Scrap
9.7Exceptional
Our Rating
-
-
Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
Careful review Our team ensures quality, value, and fit based on real user feedback
Trusted insights AI and human analysis guide your decisions, reflecting real user prioritiesReal users impact
Thousands of users trust our site daily
- Based on millions of stores and reviews
- Shoppers influence our rankings
Analyzing top stores
Value for Money2
GemtoneGemtone All-in-One Gold, Silver, Platinum & Diamond Jewelry Testing and Appraisal Kit with Solutions, Digital Scale, Diamond Tester, Touchstone, and Accessories
9.5Excellent
-
3
GTEPurity Testing Kit for Diamonds Gemstones Moissanites Gold Silver and Platinum Jewelry Electronic Digital Diamond Tester Machine JSP GTE
Key specs-
Accuracy:Fast and accurate
-
Karat Range:Gold, Silver, Platinum
-
Test Types:Jewelry testing
-
Power Source:N/A
-
Portability:N/A
9.3Excellent
-
4
SizivikiDiamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Tester Pen Professional for Professional Jewelers, Gem Tester (Metal Detection Limitation)
Key specs-
Battery:9V, not included
-
Dimensions:5.31L x 0.87W x 1.57H
-
Testing Method:Sound alert above 9
-
Sound Alert:Yes
-
Weight:3.52 ounces
9.1Excellent
Our Rating
-
5
HMKISHMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)
8.9Very Good
-
-
See Today’s Deals & Prices
6
HMKISHMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)
Key specs-
Battery:1 9V battery included
-
Dimensions:10.16 x 2.17 x 1.38 inches
-
Testing Method:Beeping sound alerts
-
Sound Alert:Beeping-beeping-beeping
-
Weight:4.2 ounces
8.7Very Good
Our Rating
-
7
ValkynosValkynos Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s Detection, Portable Gem Checker for Novice & Experts – Battery Included
8.4Good
-
8
HqdzDiamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)
8.3Good
-
9
GenericGold Tester,Professional Gold Tester Kit for Jewelry,Portable High Accuracy Diamond Selector Electronic Device,Professional Jewelry Diamond Selector Kit,for Novice and Expert1
8.2Good
-
10
Hqdz-tdProfessional Diamond Tester Pen, High Accuracy Jewelry Diamond Tester, Electronic Diamond Gem Tester and Tester Pen 60X Magnifying Glasses Tool Kit for Novice Expert (Diamond Tester Pen)
8.0Good
-
