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Diamond Testing Machines of 2025
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Best Choice1
PresidiumPresidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones
9.9Exceptional
Our Rating
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Value for Money2
GenericDiamond Tester Machine with LED Indicator, 60X Magnifying Glass, Quick Warm-up, Highly Accurate Testing, Easy to Use for Professional Diamond Testing Device
9.8Exceptional
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3
HMKISHMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)
Key specs-
Dimensions:10.16 x 2.17 x 1.38 inches
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Testing Method:Beeping sound alerts
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Sound Alert:Beeping-beeping-beeping
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Weight:4.2 ounces
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Battery:1 9V battery included
9.6Exceptional
Our Rating
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4
HqdzHigh Accuracy Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black)
9.5Excellent
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5
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
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Karat Range:Gold, Silver, Platinum
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Test Types:Jewelry testing
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Power Source:N/A
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Portability:N/A
9.3Excellent
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6
SizivikiDiamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Tester Pen Professional (Metal Detection Limitation)
Key specs-
Dimensions:5.31L x 0.87W x 1.57H
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Testing Method:Sound alert above 9
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Sound Alert:Yes
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Weight:3.52 ounces
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Battery:9V, not included
9.2Excellent
Our Rating
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7
BroadsheetDiamond Tester Professional, High Accuracy Jewelry Diamond Tester Pen, Electronic Diamond Gem Tester and Tester Pen 60X Magnifying Glasses Tool Kit for Novice Expert
10% OffKey specs-
Dimensions:7.87 x 3.94 x 1.57 inches
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Testing Method:Audio instructions
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Sound Alert:Beep if fake
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Weight:7 ounces
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Battery:N/A
9.1Excellent
Our Rating
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8
HqdzRechargeable Professional Diamond Tester Pen with UV Light,High Accuracy Jewelry Diamond Tester,Electronic Diamond Gem Tester and Tester Pen-Diamond Selector for Novice and Expert(Diamond Tester Pen)
Key specs-
Dimensions:6.5 x 1.2 x 1.2 inches
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Testing Method:Thermal conductivity
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Sound Alert:High-frequency sound
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Weight:3.88 ounces
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Battery:1 9V battery included
9.0Excellent
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9
Hqdz-tdDiamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional Diamond Selector for Jeweler Novice and Expert,Thermal Conductivity Meter (Diamond Tester)
8.8Very Good
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10
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
8.6Very Good
Our Rating
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