The 5 Best CZ Diamond testers (2023 reviews)

Hmkis cz diamond tester is the epitome of what a great tester should be. This diamond tester is a great deal with the jewler scope and rechargable 9v included. It can be distinguished, the hardness of jade and diamond of different materials is different, and the equipment can be distinguished. The tip of the pen is the size of a sewing needle so it can detect on very small stones using a steady hand. If even slightly tilted, it will give no reading or alert as diamond.

You will love the fact it actually comes with its kit, cover cases, a battery, and a lil Flashlight/UVLight Microscope. The 9V battery itself is actually rechargeable as you plug it into a USB cable. It is a good tool to have around the house, easy to check types of stones you may come across.

Why We Like This:

Great and reliable source of authentification
Easy-peas for someone who is not a jeweler to test their diamonds
Easy to use, and fun worked well
Include magnifying glass additionally can now verify authenticity of jewelry

Best For jeweler: Stillcool CZ Diamond Tester

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The stillcool cz diamond tester is suitable and reliable and fits well with your daily usage. Diamonds are fantastic conductors of heat, so the rate of change is very high when you touch the tip to a real diamond, less for a CZ and say nearly zero for a piece of acrylic etc. The metal sensitivity beep may go off a couple times if your diamonds are "lab diamonds" because sometimes lab diamonds have tiny little scraps of metal left over from the process. It is a flame fusion stone.

The stillcool diamond tester pen is easy to operate. This protects the surface of the test object is clean, flat and dry. It can be a bit cumbersome at times. The tester itself works great once you learn the correct way to use it. This is a fun little tool to identify your diamonds or maybe not diamonds.

Why We Like This:

Great tool to have for detecting diamonds
Great value, easy to use and accurate
Simply enough to just add batteries

Best For price: Dupeakya CZ Diamond Tester

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Dupeakya has been making great tester for years, thanks to a combination of clever design and appropriate materials. These are beautiful, flawless, and very sparkly gemstones. It can distinguish ALL authentic gemstones from, say glass or cubic zirconias. The level wheel is a sensitivity selector. It is used for testing sapphire, ruby, crystal, agate and other stones. The diamond detector with voice instructions and audible sounds are emitted when the lights are on so that you can easily distinguish between masonry and stone.

This device works as long as you follow the instructions in the manual. The device needs to be restarted after a few minutes of use to be recalibrated. It comes with a soft case and small stone tray. It has a small instruction booklet.

Why We Like This:

Gives a glass reading on all semi precious stones
A must for someone who has jewelry
Man-made diamonds are flawless and beautiful

Best For defecting Fake Diamonds: Szxhf CZ Diamond Tester

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Compared with other tester in this category, the szxhf cz diamond tester has a convenient design. 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’s easy to use and accurate even on small diamonds. It is an excellent instrument for metal detecting. It is great for defecting fake diamonds. 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

Best little Diamond Tester: Asahijade CZ Diamond Tester

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We would, of course, be remiss if we didn't mention asahijade cz diamond tester for daily purpose. It includes a little stand that will allow you to test loose stones not in a ring. It comes with the tester, a 9v battery that’s included a metal piece to put your stone, and a leather case. It includes battery instructions and a leather pouch to keep it in when not in use. The reader must have a firm, proper contact with the test material, so you must hold it at a 90 degree angle to the stone in order to assure a proper reading. It's easy to follow instructions and as long as used correctly. The calibration settings are very important for the best results.

Why We Like This:

You can also make it beep by turning the volume up
Good investment for long term