8 Best diamond testers on the market in 2022: Comparison Table
The most reliable way to tell whether a diamond is fake or real is to use a special-purpose diamond tester. The mode of operation of this device is based on detecting conductivity, which is different for each type of material. The thing is that heat and electricity pass through glass or moissanite in a different way than they do through a diamond.
Diamond testers are available in a wide price range, from around $30 to $200 and more. However, we do not recommend buying cheap models as they are made by unknown manufacturers and are likely to be very inaccurate. Indeed, it would be weird to use a low-quality tester to buy expensive diamond jewelry pieces.
How Diamond Testers Differ
Diamond testers can be categorized into two types: thermal and electric models.
- The electric tester uses heat to create thermal conductivity between the object and the unit’s tip. By calculating how fast the heat passes through the stone, the device determines whether a diamond is genuine or not.
- The downside to thermal diamond testers is that they provide less accurate results and cannot distinguish diamonds from moissanite. On the other hand, a thermal diamond tester is more budget-friendly and is very helpful as a complementary tool.
Diamond Testers from Trusted Manufacturers Compared
An excellent example is the PDMT-A Diamond Mate Electronic Tester A which can differentiate diamonds from simulants.
Electric diamond testers are more accurate and work by measuring a stone’s electrical properties. In particular, electric models can differentiate a diamond from a laboratory-grown synthetic simulant known as moissanite.
For this purpose, we suggest the GemOro Ultratester 3+ that utilizes new UV-F1 moissanite identification technology. The device can even detect the new Forever One moissanite that features super-low conductivity and is hard to distinguish from a diamond.
The GemOro Ultratester 3+ is produced by Gemoro, a division of Sy Kessler Sales headquartered in Texas. Incorporated in 1968, Sy Kessler Sales is a world-class supplier of equipment for the jewelry industry and a reliable producer of diamond testers.
Best-Selling Diamond Testers | Comparison Table
Most Popular
Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying...
- INCLUDED ASSISTED THERMAL CALIBRATION | Now easily self calibrate your device to your testing environment
- INDUSTRIES MOST TRUSTED | Gemstone tester redesigned to be more compact, sturdy and portable
- THINNEST RETRACTABLE PROBE TIP I PGT II features the industry’s thinnest retractable probe tip
- VERSATILE AND RELIABLE | Consistent and reliable results every time. Identifies diamonds/moissanites
- SIMPLE & EASY TO USE | Clear and easy-to-read analog dial; Can differentiate 16 types of gemstones
Products with 5 star rating
Other Popular
Gemoro Testerossa Diamond, Moissanite & White Sapphire Tester
- Identifies, detects and separates diamond from CZ, moissanite and white sapphire with New Enhanced M
- New Enhanced Moissanite Testing Technology for low conductivity stone identification
- LED stone illumination and UV fluorescence detection,Retractable probe tip with enhanced durability
- Powered by MICRO USB or with its included rechargeable NiMH batteries, or your AAA Akaline Batteries
- Unprecedented 10-YEAR PROBE TIP WARRANTY; Lifetime Limited Replacement Warranty on the tester
Presidium Multi Tester III (PMuT III) All-In-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants
- IMPORTANT TO NOTE: This product needs to be calibrated prior to use. If you experience issues with calibration, please reach out to the seller for assistance prior to returning the item.
- EASY TO USE DESIGN: Ergonomic handheld design with a rubberized anti-slip grip for easy handling. Light and portable with a convenient carrying case.
- THINNEST RETRACTABLE PROBE TIP: Retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, the PMuT III tests colorless diamonds as small as 0.02ct.
- CLEAR, CONVENIENT DISPLAY: 180-degree multi-viewing LED display for easy readability for either right or left-handed use
- ALL-IN-ONE INSTRUMENT: The world’s first tester that tests for both colorless diamonds and moissanites in a single instrument.
Presidium SDS Synthetic Diamond Screener
- Advanced technology that measures a diamond’s UV light transmittance ability
- 2 color coded (blue/red) indicator light bars to give a low or high reading of UV light absorption with blue light indicating Natural Diamond and red light indicating Type IIa Diamond
- Instantaneous clear results within 2 seconds
- Blue light to illuminate the testing pad
Cheap Jewelry Diamond Testers under $20
[Upgraded] High Accuracy Diamond Tester by Hai-electronic
- [Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.
- [Intuitive Design]:LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.
- [Simple to Use]:Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.
