The 8 Best electronic gem testers (2023 reviews)

The molo electronic gem tester is the best feature-rich tester on the market today. This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It is a kind of diamond and can be distinguished. The Molo diamond tester pen is simple to operate to get results, professional(s) are not required. It provides enough light at any dim conditions. It comes with a faux leather pouch, so you can protect it from scratch, attrition, etc. It can detect if a gemstone is real or fake, including.

This is a Accurate diamond tester just make sure you read the directions. The product works by accurate testing.

Why We Like This:

Excellent quality, value and easy to use
Good brand reputation

Best For price: Dupeakya electronic gem Tester

Buy on Amazon

The dupeakya electronic gem tester's material feels more premium than its price would suggest. These are beautiful, flawless, and very sparkly gemstones. It is a very basic tester, if it glass lights won’t move. This has an electric conductance test to warn you of metal contact. The level wheel is a sensitivity selector. The tester differentiates between natural crystals and man made crystals "synthetic" like CZ's. It detects diamonds well if you follow the instructions.

This device can also test ruby, sapphire, emerald, topaz, etc. It also has no reaction at all for glass or stone.

Why We Like This:

Great tester for gems and diamonds
Man-made diamonds are flawless and beautiful
Simple devise to help quickly determine authenticity of stone
Highly recommended for anyone who cannot afford to be fooled

Best For defecting Fake Diamonds: Szxhf electronic gem Tester

Buy on Amazon

The szxhf electronic gem tester is capable of outshining several other tester featured in this list in overall features in its price range. The Black Diamond Selector II" is a portable electronic device for distinguishing real diamonds from other simulated stones. It is an excellent instrument for metal detecting. It’s easy to use and accurate even on small diamonds. It is great for defecting fake diamonds. It is fake crystal, a simulant such as cubic zirconium (cz), and there will be no reaction. It is designed for quick, precise, and safe diamond testing.

Why We Like This:

Portable electronic device for distinguishing real diamonds from other simulated stones
Works perfectly and is easy to use
Emit audible sounds to give accurate reading
Large / small switch for testing diamonds +/ - 8 points

Best little Tester: Ketar electronic gem Tester

Buy on Amazon

Simple calibration for stones of various sizes the jewelry tester silver and diamond tester are easy to use even for a new beginner, tester electronic pen is also a great tool to have when testing your own jewelry. The gem and diamond tester is designed to indicate genuine diamond or fake, working time is about 2 hours of continuous use.

The tester indicates genuine diamond or fake, the jewelry tester meter is designed and manufactured according to the thermal conductivity of diamond, the fake crystal, and a simulant such as cubic zirconia does not have any reaction. You will be able to know in a few seconds whether an item is fake or not, there are the LED indicator and the audible signal a red light will be displayed and an audible indicator will sound if the stone is a real diamond. It comes with a vinyl protection case.

Why We Like This:

Great little tester that comes with little vinyl protection case
Easy to operate jade jewelry tester
Excellent product to detect validation of stones
Wide uses of electronic diamond tester

Best primary Tester: Smartpro electronic gem Tester

Buy on Amazon

If you are looking for a suitable tester for your regular usage, you cannot go wrong with the smartpro electronic gem tester. It is a remarkable designed gemstone tester with color estimator display for smoothly and seamlessly testing your precious stone and diamond. It is developed to distinguish between diamond and its other simulants using the principles of thermal conductivity. It is great for determining whether or not a gem is diamond, topaz, crystal glass, etc. While automatic shut off is a nice feature it does work kind of quickly. It also has a fantastic little manual for which the other unit does not.

The ambient temperature in the office has to be at the very least 72 degrees for it to warm up. It just tells you the range in hardness really. It is used for faceted stones indoors.

Why We Like This:

Needle points to glass just by waving the pen around
Identifies metals, simulants and diamonds instantly
Best used for faceted stones indoors
Portable tester that can be used anywhere

Best For identification assistance: Clina electronic gem Tester

Buy on Amazon

Clina has been making great tester for years, thanks to a combination of clever design and appropriate materials. A new portable high accuracy diamond tester diamond observation tool, you can use infrared irradiation in the diamond to evaluate the diamond. It is made of quality material, which is eco-friendly and durable to use. It is a diamond selector with accurate and reliable reading, but also a multi-gem tester.

The High Accuracy Diamond Tester ergonomically designed handle is comfortable to grip. It is perfect for buying jewelry, buying / exchanging diamonds, sorting through scrap, making an offer on property sales, auctions and more. The high accuracy diamond tester compact size is easy to use and portable to store. It is suitable for jewelry display or identification assistance.

Why We Like This:

High accuracy diamond tester metal, simple calibration for stones of various sizes
Good investment for long term

Best Accuracy: Presidium Diamondmate Diamond Tester

Buy on Amazon

Presidium offers a variety of tester for personal choice and yet maintaining quality in all the variants. The Diamondmate diamond tester utilizes a proven thermal conductivity testing method to instantly verify the authenticity of diamonds. It is easy to leave on or accidentally turn on. This tester is a bit akward to see the results over the finger movements while testing. It comes with rechargeable batteries.

The Diamondmate diamond tester, like a thermal conductivity tester, can not eliminate synthetic moissanite. It can be sensitive too if you do not place properly on the smaller diamond. This model requires 3 AAA batteries. It comes also with a very nice storage pouch with a little slot inside to store the batteries when not in use.

Why We Like This:

Uses thermal conductivity tests to detect diamond and simulants
Easy to use and works well
Works great no issues at all
Instant recovery time in between tests

Best value For money: Presidium electronic gem Tester

Buy on Amazon

If you often find yourself scrambling for decent quality and cost-effective tester, presidium electronic gem tester is your end point. It's a very good diamond tester. It comes with rechargeable batteries and an ac adaptor to recharge them. It comes with the matching adapter. The green light takes a while to light up before the instrument can be utilized. It comes with a cord that plugs in to Presidium Diamondmate-C and in to electricity. It's better built and will last longer.

The unit comes with one which can be recharged with the charger that comes with it.

Why We Like This:

Able to test smaller stones in really tight, recessed spaces easily
Good investment for long term

The 8 Best electronic gem testers (2023 reviews)

Our Top Picks:

Best Overall: Molo electronic gem Tester

Best For price: Dupeakya electronic gem Tester

Best For defecting Fake Diamonds: Szxhf electronic gem Tester

Best little Tester: Ketar electronic gem Tester

Best primary Tester: Smartpro electronic gem Tester

Best For identification assistance: Clina electronic gem Tester

Best Accuracy: Presidium Diamondmate Diamond Tester

Best value For money: Presidium electronic gem Tester

6 Best electronic gold purity testers

8 Best electronic gold Coin testers

9 Best electronic gold Testing kits