Do diamond testers really work?
Yes, diamond testers are effective tools for determining the authenticity of diamonds. They work by measuring the electrical conductivity or thermal conductivity of a gemstone, which is a characteristic unique to real diamonds. Here's a detailed explanation of how they function and what to consider when using or purchasing one:
How Diamond Testers Work: Diamond testers typically use either electrical conductivity or thermal conductivity to test the authenticity of a diamond. Real diamonds have excellent electrical conductivity, and when a probe connected to an electrode touches a real diamond, it glows, indicating its authenticity. If the gemstone does not glow, it is likely a fake. Similarly, thermal conductivity testers measure how quickly heat dissipates through the stone; diamonds conduct heat much better than most other gemstones, including cubic zirconia.
Applicability to Other Gemstones: Diamond testers are specifically designed for testing diamonds and, in some cases, moissanite. They are not typically effective for testing other gemstones like rubies. This specificity is crucial because different gemstones have different physical properties that affect conductivity.
What to Look for When Buying a Diamond Tester:
- Usability: The tester should be easy to use and comfortable, especially if it is intended for frequent use in a professional setting.
- Metal Detection: Some advanced models include metal detection features to prevent false readings from accidental contact with metal surfaces.
- Accuracy and Versatility: Look for testers that can differentiate between natural and lab-grown diamonds, detect treated diamonds, and flag synthetic diamonds that might otherwise fool standard testers. Some testers use ultraviolet short waves instead of heat and electrical conductivity, offering a more nuanced analysis.
Testing for Fake Diamonds or Cubic Zirconia: Diamond testers can accurately check for fake diamonds or cubic zirconia, as these materials do not have the high thermal conductivity of real diamonds. This makes them distinguishable by a diamond tester.
Conclusion: While diamond testers are reliable for their intended purpose, it's important to use them correctly and understand their limitations. Always verify the tester's accuracy against a known diamond before testing unknown gemstones, and consider the specific features and capabilities of the tester when purchasing one.
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