Diamond Testers

A diamond tester distinguishes diamonds from all other minerals except moissanite. 

Who needs a diamond tester? The science of gemology is about distinguishing one mineral from another by its physical properties.  How do you distinguish a diamond from a ruby or a sapphire or a topaz? Each may have a different hardness.  Each may refract light differently.  Each may have a different spectrum when viewed under a spectrometer.  You probably have not attended a gemology course, and you do not intend to shlep a refractometer or a spectrometer with you.  What you need is a portable, reliable and reasonably priced instrument that will tell you if you are looking at a diamond. 

A diamond tester distinguishes diamonds from all other minerals except moissanite.  After determining that your stone is probably a diamond by using a diamond tester, you test it if you need to be certain it is not a moissanite.  Learn about moissanite testing.

A diamond tester works by sending heat into the stone and measuring how fast the stone conducts the heat. Each type of gemstone has its own characteristic rate for conducting heat.

A diamond multi-tester distinguishes diamonds from all other minerals including moissanite.

Diamond Wizard Multi-tester

Diamond Wizard Multi-Tester

by Tri-Electronics

Tests simulants and moissanite, fast turnaround, accepts rechargable batteries and features light enhanced moissanite detection.

MSRP: $279.00 Your Price: $179.95

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AC Power Supply for All Tri-Electronics Diamond Multi-Testers

Accepts AC 120V

MSRP: $25.00 Your Price: $9.95

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A multi-tester combines the heat conductivity test of a diamond tester with the electrical conductivity test of a moissanite tester in a single test instrument.

Since most diamond multi-testers work this way, how do you shop for a diamond tester? One critical feature to look for is whether the multi-tester will warn you if you are touching a metal prong instead of a gemstone.  This is important because a metal prong will register as diamond on most diamond testers that lack a metal warning.

If you will be using the diamond tester in multiple locations, you will want one that will test diamonds accurately across a range of different room temperatures.  After all, you are doing a thermal conductivity test.

If you are going to be testing diamonds in large numbers, you will want your diamond tester to warm up fast and to have little or no lag time between tests.

You may want to power the diamond tester with a convenient and replaceable battery, unfettered by a power cord.  Or, you may want to sit at your bench and bulk test gemstones one after the other, relying on AC power.  Your diamond tester should give you either option.

You are going to want a multi-tester with a retracting tip.  The reason is that the spring loaded tip assists you to apply just the right amount of pressure without damaging the tip, avoiding damage and downtime for repairs.

Finally, where is the factory that manufactured your diamond tester?  How long is your warranty and where do you get your warranty service done?

We feature combination diamond/moissanite testers made by Tri-Electronics, based in San Diego, California. They have ALL of the features noted above, great factory warranties and EXCELLENT service.

High intensity light enhances the detection of moissanite with a multitester applying an electrical conductivity test.  The Diamond Wizard features a high intensity light illuminating the diamond that you are testing.  Though it comes with 3 AAA alkaline batteries, it accepts 3 AAA NimH Batteries which are rechargeable. An A/C power adaptor is optional at $9.95. It is covered by a 3 year factory warranty.  Warranty service takes place reliably in San Diego, California.