10 bestDiamond Testersof May 2025
112M consumers helped this year.
1
JZK Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2
JZK
9.8
2
Diamond Tester Pen, High Accuracy Electronic Jewelry Diamond Tester Pen Professional Diamond Detector with 2Pcs 30X 60X Magnifying Glasses Mini Led Foldable Magnifying
CDIYTOOL
9.6
3
PRESIDIUM DIAMONDMATE-C ELECTRONIC DIAMOND TESTER
Presidium
9.4
4
Handheld DIAMOND TESTER with UV Ultraviolet Light, Mounted Jewelry Loose Stone Gemstone 2pt Jewel Stone Tool Selector For Novice and Expert, No Calibration Needed
GAIN EXPRESS
9.1
17% off
5
Diamond Tester, High Accuracy Diamond Tester Pen with LED Indicator Light and Sound Prompt, Portable Electronic Diamond Tester Professional for Novice and Expert, Diamond/Sapphire/Ruby/Crystal
DUPELEC
8.9
Other
AZDelivery 3 x USB Charger Doctor Current Voltage Charging Detector Battery Voltmeter Ammeter Multimeter Tester including eBook
AZDelivery 5 x Digital Multimeter Dual LED Display Voltmeter DC 4.5V 30V 20mA Ammeter DSN-VC288 Amperemeter with LED Display compatible with Arduino and Raspberry Pi including E-Book!
AZDelivery Multi Servo Tester 3CH ECS Speed Current Controller 4.8-6V Power CCPM Servo Consistency Master 15mA Meter Server Test Centering Tool including E-Book! (Pack of 3)
Best Sellers Diamond Tester Pen＋60X Mini LED Magnifying,High Accuracy Jewelry Diamond Tester Tool,Environmental Protection 9V Battery,Professional Diamond Selector for Novice and Expert
6
Diamond Selector II Gold Testing Kits Gem Pen Gemstone Jewelry Tester Tool,Portable Electronic Diamond Tester Pen Jewelry Selector LED(Black)
HOMYY
8.6
7
Portable Diamond Selector Tester Pen LCD Display Jewelry Testing Tool with 30X Magnifying Glass
YWBL-WH
8.4
8
Weytoll Diamond Tester Pen High Accuracy Diamond Selector Detector Gemstone Jewelry Testing Tool with Case for Novice Expert
Weytoll
8.1
8% off
9
XUBX Diamond Pen, Diamond Thermal Conductivity, Diamond Identifier Test Hardness Diamond Hardness Tools Portable Electronic Diamond Tester 9v, Jewellery Diamond Selector, Use Of Batteries.
XUBX
7.8
10
Jewelry Diamond Detector and Tester Pen with Light, Professional 10x 21mm Magnifying Glass, for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, Gems Testing
Hapivida
7.5
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A Guide to Selecting the Best Diamond Testers
Choosing the right diamond tester is crucial for anyone involved in buying, selling, or appraising diamonds. A diamond tester is a tool used to determine whether a gemstone is a real diamond or a simulant. When selecting a diamond tester, it's important to consider the accuracy, ease of use, and the types of stones it can test. Understanding the key specifications will help you make an informed decision that suits your specific needs, whether you're a professional jeweler or a casual buyer.
Testing Method
The testing method refers to how the diamond tester determines the authenticity of a diamond. There are primarily two types: thermal conductivity testers and electrical conductivity testers. Thermal testers measure how quickly heat passes through the stone, which is effective for distinguishing diamonds from most simulants. Electrical testers, on the other hand, measure electrical conductivity and can differentiate between diamonds and moissanite, a common diamond simulant. If you frequently encounter moissanite, an electrical tester might be more suitable. For general use, a thermal tester is often sufficient.
Accuracy
Accuracy is a measure of how reliably the tester can distinguish between real diamonds and other stones. High accuracy is crucial to avoid false positives or negatives, which can lead to costly mistakes. Testers with higher accuracy often come with advanced features and may be more expensive. If you are a professional who deals with high-value transactions, investing in a highly accurate tester is advisable. For casual use, a tester with moderate accuracy might suffice, but always check reviews and ratings to ensure reliability.
Ease of Use
Ease of use refers to how simple and intuitive the diamond tester is to operate. This includes the design of the device, the clarity of the instructions, and the user interface. A tester that is easy to use will save time and reduce the likelihood of user error. If you are new to using diamond testers, look for models with straightforward instructions and a user-friendly design. Professionals might prefer testers with more features, but these should still be easy to navigate to ensure efficiency.
Portability
Portability is about how easy it is to carry and use the diamond tester on the go. This is particularly important for jewelers or appraisers who travel frequently. Portable testers are typically lightweight and battery-operated, allowing for use in various locations. If you need to test diamonds in different settings, a portable tester is essential. For stationary use, such as in a store or office, portability might be less of a concern, and you can opt for a larger, more robust model.
Battery Life
Battery life indicates how long the diamond tester can operate before needing a recharge or battery replacement. Longer battery life is beneficial for those who use the tester frequently or in locations where recharging is inconvenient. If you plan to use the tester extensively throughout the day, look for models with long-lasting batteries or those that offer quick charging options. For occasional use, battery life might be less critical, but it's still worth considering to avoid interruptions during testing.
Compatibility with Gem Types
Compatibility with gem types refers to the range of stones the tester can accurately assess. Some testers are designed specifically for diamonds, while others can test a variety of gemstones, including moissanite and other simulants. If you work with a wide range of gemstones, a tester with broader compatibility will be more versatile and useful. For those focused solely on diamonds, a tester specialized in diamond testing might be more appropriate and potentially more accurate.
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