The 8 Best Diamond Testing tools (2023 reviews)

The hqdz diamond tester is specially designed for your daily usage and has all useful features. It is easy to use and works great. It only detects real diamonds and moissanite. The instructions also mention it going off when it touches metal which is a buzzing sound vs. a 3 beeb tone for diamonds. It is great for testing watch crystals.

It includes 1 standard 9v battery, which is easy to use and light turns on on any metal.

Why We Like This:

Perfect gift for any gemstone collector
Electrical and thermal testers work regardless of size, cut, color, clarity
Diamonds are tested either thermally or electrically
Nice little tester good for testing jewelry

Dupeakya Diamond Testing Tool

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The dupeakya diamond testing tool is satisfactory and appropriate and fits well with your daily usage. It is a portable electronic device for distinguishing real diamonds from other simulated stones. It is an electronic instrument designed and manufactured according to the thermal conductivity of diamonds to identify the true and false diamonds. The tester uses heat conduction because the speed of heat conductance is proportional to the hardness of the stone. It detects diamonds well if you follow the instructions. There is a chart on the back of the device that indicates where to set the starting point based on the size of the stone you are testing.

It works for all diamonds, including black diamonds and white diamonds. It also has no reaction at all for glass. The device needs to be restarted after a few minutes of use to be recalibrated. It is extremely accurate and easy to use if you follow the instructions.

Why We Like This:

A great inexpensive option for determining authentic diamonds
Man-made diamonds are flawless and beautiful
Works great can test other stones
Highly recommended for anyone who cannot afford to be fooled

Szxhf Diamond Testing Tool

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The szxhf diamond testing tool gives the top-tier tool a run for their money by offering flagship specs at a much more affordable price. The Black Diamond Selector II" is a portable electronic device for distinguishing real diamonds from other simulated stones. It is a fake crystal, and a simulant such as cubic zirconium (cz), will have no reaction. It is great for defecting fake diamonds. It is easy to use and accurate even on small diamonds. It's an excellent instrument for metal detecting. It is designed for quick, precise, and safe diamond testing.

Why We Like This:

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

Hqdz Diamond Testing Tool

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Compared with other tool in this category, the hqdz diamond testing tool has a convenient design. Hqdz’s diamond tester pen and 60x led lighted loupe combo is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. It is reliable or precise enough to be used by a jeweler. It comes with its own convenient carrying cases.

It is powered by DC 9v battery x 1 ( included) to test diamond turn on the switch. It is lighting up on the scale. The test takes a few minutes, please turn off the power after the test is complete. It is also a great tool to have when testing your own jewelry. It is great for estate sales and tag sales.

Why We Like This:

Great and comes with a lot
Large / small switch for testing diamonds / - 8 points
Good investment for long term

Xinler Diamond Testing Tool

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Xinler is known for creating pragmatic and minimalist tool for people on the go, and its line of xinler diamond testing tool definitely falls in line with that reputation. This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can definitely identify real and fake diamonds, as well as sapphires. The bigger the stone and less green marks you use on the meter...if the stone is authentic diamonds the light bar will completely light up and will strobe beep beep. This item is a must have as a purchase jewelry or jewelry.

Why We Like This:

Very affordable and good job for testing
New and hot release

Szxhf Diamond Tester Pen

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The szxhf diamond tester pen might be a relatively new release, but it's still nothing short of impressive this year, thanks to multiple price cuts and added new features over the past few months. This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including. It has 200 grams max weight capacity and reads weights in increments of 0.01g. It provides enough light at any dim conditions. Alternatively, its also a great tool to have when testing your own jewelry.

The Portable Diamond Tester Pen and 60X LED Lighted Loupe each comes with its own convenient carrying cases. The pocket size is convenience to carry, you can use it in everywhere with a faux leather pouch, can protect it from scratch, attrition, etc. It is easy to use. It comes with its own convenient carrying cases.

Why We Like This:

Energy saving by 3 minutes auto-off function
Perfect for food, tablets, powder, gemstones, coins, jewelry, weed, gold, silver, coins and etc
High precision sensors make sure the accuracy
A must for someone who has jewelry

Pmc Supplies Llc Diamond Testing Tool

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The pmc supplies llc diamond testing tool's material feels more premium than its price would suggest. This diamond tester features both an automatic and manual mode with advanced testing features.

Why We Like This:

Low battery indicator for accurate readings
Unique new anti-fade circuit which compensates for stone heating
Adjustable gain for small stone sizes
Auto shut-off with a push button switch

Zerone Diamond Testing Tool

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The zerone diamond testing tool is capable of outshining several other tool featured in this list in overall features in its price range. This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It is designed for quick, precise, and safe diamond testing. It can detect if a gemstone is real or fake, including. The Diamond Tester Pen is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. It comes with LED lights and audio indication.

The probe of this instrument is very sensitive. It is designed to deliver fast, accurate results. If it is for correct testing, it is recommended that you take a calibration adjustment after annual maintenance. Alternatively, its also a great tool to have when testing your own jewelry.

Why We Like This: