Best Diamond Testers In 2022

If you need a quick, easy, and portable way to be able to detect between real and fake diamonds, then our Best Choice product is an excellent product recommendation. The HDE professional diamond tester is conveniently battery powered and comes supplied with its own quality leather carrying case to protect the sophisticated device when not in use. It’s small and discreet enough to carry around and provides an instant and accurate reading too. The cost of purchasing this professional and compact style diamond tester is a fraction of the cost of a real (or even potentially fake) diamond plus it can provide you with peace of mind knowing that what you are about to invest in is genuine.

Featuring a low battery indicator as well as emitting an audible sound to differentiate between readings, it features both small and large switches for diamond testing. It merely requires just one 9V battery to operate, and it’s also supplied with a small testing tray. Also, be sure of weeding out imposter gems with this HDE highly accurate and super portable gadget which is easy enough for both novice and experts to use.

Our next product recommendation in the category of best diamond tester comes from RS Mizar, and it’s their Oris Nelson Terminator Moissanite tester. Or O.N.E for short. It’s a portable, pocket-sized device which quickly enables the user to detect between Moissanite and synthetic gemstones. Using a process of thermal conductivity, this unit provides both a visual and audio indicator of authenticity.

It’s simple and easy to operate and just requires the probe tip of the unit to be held against the stone to be tested. A discontinuous beep along with a flashing green light will alert you to what it is that you are physically dealing with. There’s no waiting or downtime in between tests, and your purchase comes with both a probe cover to protect the tip as well as a loose stone holder. It’s battery powered and uses a 9-volt alkaline battery which is included when you buy your O.N.E testing kit. There’s also a low battery warning indicator for your convenience.

We’re back again looking at what industry leader, Presidium has to offer with its range of diamond testing professional tool kits. Their Gem Tester II has recently been redesigned by the brand to be even more compact, portable and sturdier than ever before making it an excellent choice for anyone who’s regularly out and about, visiting auction houses for example. This is the second generation of this particular model, and it provides a quick and easy means of identifying diamonds, moissanite as well as up to 16 other common colored gemstones. Working on the principle of thermal conductivity, it’s accurate and precise and clearly displays the results on an analog display.

This new model has redesigned inbuilt calibration and can be adjusted according to whether you’re indoors or outdoors. It features the industry’s thinnest retractable gemstone probe tip which can test colored gemstones as small as 0.02 carats as well as also being able to test coated gemstones. There’s a metal buzzer alert which emits a reassuring audible sound to denote that the tip is in proper contact with the gem. Conveniently it can be run on just two AA batteries for the ultimate portability, or if you prefer, it can be used with the AC adapter also included with your purchase. For reliable results and no waiting time in between tests, the Presidium Gem Tester II represents an excellent choice. 

This pocket-sized yet precise, totally portable diamond tested from Presidium allows the owner to verify the authenticity of diamonds instantly. Working on the basis of thermal conductivity, this neat and discreet device features a retractable probe tip, delivering consistent pressure against the surface of the gemstone you are analyzing to provide reliable results.

Featuring what is currently the diamond testing industry’s thinnest probe with a tip size of just 0.6mm it can be used to test diamonds as small as 0.02 ct. Results are instantly recorded with both a clear audible beep emitted from the device as well as on the LED light display. There’s no waiting time required in between tests, and the unit consumes minimal battery power. Its conveniently powered by rechargeable batteries as well as an AC adaptor,  both of which are included with your purchase. Lightweight, portable, and easy to use, it’s also supplied in its own protective carrying case so that your Presidium Diamondmate unit is fully protected during when not in use.

Our next best diamond tester product comes from GemOro and is their 3rd generation Ultratester. Improved to b even more sensitive and to more accurately deal with today’s ever-changing use of modern synthetics. The patented design of this handheld diamond testing device is sleek and ergonomic and ultimately portable. This unit has an excellent reputation for both it’s accuracy and reliability and can detect a wide range of moissanite, diamonds as well as white sapphires.

With a glowing probe tip cone indicator that changes to green to denote diamond and red to denote metal, this unit is simple and easy to use. There’s a bright white LED stone illuminator light too as well as an audible ring tone so that you’re provided with both audible and visual indicators as to the authenticity of the stones you’re testing. It’s powered by 3 replaceable, long-lasting NiMH rechargeable batteries and also features a micro-USB charging system so is ideal for anyone who’s frequently required to go off-site. The probe is durable and protected by a spring-loaded cap plus it’s quick to warm up in just 10 seconds. When the unit is not in use, there’s an auto-off battery saving function. Intuitive and user-friendly with this patented finger grip pads, this sleek GemOro Ultratester comfortably fits into the hand.

Next up, we’ve got another diamond tester that uses heat to determine the authenticity of the diamond. Simply place the tip on the diamond and it will determine how quickly the heat passes through the diamond. Then, it will indicate on the LED light whether the diamond is real or not. If the stone is fake, crystal, or cubic zirconia, you won’t hear a sound. To fully understand how this little machine operates, we’d recommend reading the instructions before you attempt to use it. 

One of the main reasons people choose this Molo Diamond Tester over other products on the market is that it comes with a couple of extras. The set includes a 9V battery, which you need to operate the diamond tester. Plus, it comes with a 60X LED magnifying glass, allowing you to get a closer look of the diamond. Granted, it’s not a professional standard magnifying glass but it’s still a cool add-on.