Diamond testers are simple tools that help you determine whether a diamond is real or fake. Whether you’re a beginner exploring the world of jewelry or a curious buyer, using a diamond tester can make identifying genuine diamonds much easier. This guide will walk you through everything you need to know about diamond testers, how they work, and how to use them properly.
What is a Diamond Tester?
A diamond tester is a device that measures the thermal or electrical conductivity of a gemstone. Diamonds conduct heat differently from other stones, so testers use this difference to identify real diamonds. Typically, a diamond tester has a small probe or needle that you press onto the stone. The device then provides a reading, indicating whether the gemstone is a diamond or an imitation.
Diamond testers are handy for anyone who wants to check the authenticity of a diamond at home without going to a jeweler. These tools come in various types, and each has unique features designed for accuracy and ease of use.
How Does a Diamond Tester Work?
Diamond testers work by measuring how well a gemstone conducts heat or electricity. Real diamonds have high thermal conductivity, meaning they transfer heat quickly. When you press the tester’s probe onto a diamond, the device detects this quick transfer and displays a reading that signals authenticity.
Some diamond testers use electricity instead of heat. Diamonds are also good electrical conductors, especially compared to other stones like moissanite or cubic zirconia. By using these properties, testers can identify diamonds effectively. However, each type of tester has its own pros and cons.
Why Use a Diamond Tester at Home?
Having a diamond tester at home can save you time and money. Instead of visiting a jeweler, you can quickly check your gemstones to ensure they’re real. Using a diamond tester is especially helpful if you buy second-hand jewelry or receive a piece as a gift and want to confirm its authenticity.
Beyond the convenience, owning a diamond tester offers peace of mind. You no longer need to rely on someone else’s word about the quality of your jewelry. With a tester, you have a simple, affordable way to verify that your diamonds are genuine.
Different Types of Diamond Testers
There are several types of diamond testers available, each suited for different needs:
- Thermal Conductivity Testers – These testers measure how quickly the gemstone transfers heat. They are effective at detecting diamonds but may struggle to differentiate between diamonds and moissanite.
- Electrical Conductivity Testers – These testers measure electrical conductivity and can identify both diamonds and moissanite. They are generally more accurate but may cost more than thermal testers.
- Multi-Testing Diamond Testers – These advanced testers combine thermal and electrical conductivity testing for better accuracy. They are often pricier but are reliable for identifying diamonds.
Is a Diamond Tester Always Accurate?
While diamond testers are helpful, they’re not perfect. Some testers may struggle to distinguish between diamonds and moissanite, a gemstone that looks similar to diamonds and has high thermal conductivity. To increase accuracy, consider using a multi-tester that checks both thermal and electrical conductivity.
Diamond testers are also less reliable on very small diamonds or those set in metal. When testing a small or embedded stone, the metal surrounding it may affect the tester’s reading, leading to less reliable results.
How Much Does a Diamond Tester Cost?
The cost of a diamond tester varies based on its type and brand. Basic models that measure thermal conductivity are usually cheaper, with prices ranging from $20 to $50. More advanced models that test both thermal and electrical conductivity can cost anywhere from $100 to $300.
If you’re a beginner, a basic tester should be enough. For more frequent or professional use, investing in a higher-quality diamond tester may be worth it for improved accuracy.
Steps to Use a Diamond Tester
Using a diamond tester is simple and takes only a few steps:
- Turn on the tester and let it warm up. Most testers require a short warm-up period.
- Place the gemstone on a stable surface. Make sure it’s clean and accessible.
- Gently press the tester’s probe against the gemstone. Hold the device steady to avoid incorrect readings.
- Read the results on the tester’s display. Different testers will show the results in various ways, such as with lights or on a digital screen.
With these steps, you can quickly check if your stone is real or not. Remember to follow the instructions specific to your tester model, as each device may vary slightly.
How to Read Diamond Tester Results
Reading the results depends on the type of tester you’re using. Most diamond testers use a simple light system or digital display:
- Green light or “diamond” reading: Indicates the stone is likely a real diamond.
- Red light or “not diamond” reading Suggests the stone is not a diamond.
For testers with a digital screen, the display might show a percentage or another indicator of authenticity. Refer to the tester’s instructions for specifics on how to interpret the results accurately.
Where to Buy a Diamond Tester
You can find diamond testers in many stores, from jewelry supply shops to online marketplaces. Consider the type of tester you need, whether it’s for occasional use or frequent testing, and your budget.
Online Stores for Diamond Testers
Several online platforms offer diamond testers, including Amazon, eBay, and Walmart. These sites usually have various brands and models, allowing you to compare options.
Best Brands for Diamond Testers
Some popular brands for diamond testers include Presidium, GemOro, and PuriTest. These brands are known for their reliability and accuracy, making them good choices for both beginners and professionals.
Checking Reviews Before Buying
Reading customer reviews is essential before purchasing a diamond tester. Reviews can provide insights into the tester’s accuracy, ease of use, and durability. Be sure to read feedback on the specific model you’re interested in, as each model may have unique pros and cons.
Common Mistakes with Diamond Testers
When using a diamond tester, avoid these common mistakes:
- Not cleaning the gemstone. Dirt and oils can interfere with the tester’s reading.
- Applying too much pressure. Pressing too hard can damage both the gemstone and the tester’s probe.
- Ignoring metal settings. Metal can affect the accuracy, so ensure you test only the gemstone itself.
The Bottom Line
A diamond tester is a helpful tool for anyone interested in jewelry, providing a quick way to identify genuine diamonds. By understanding how a diamond tester works, following proper steps, and choosing the right model, you can confidently verify the authenticity of your gemstones at home. Remember to check reviews, consider different types of testers, and avoid common mistakes for the best results. With the right tester, you’ll enjoy the peace of mind that comes with knowing your diamonds are the real deal.
