The 7 Best gem hardness testers (2023 reviews)

• Date : August 17, 2023
• Categories : Jewelry Diamond Testers

We consider a gem hardness tester to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: HMKIS gem hardness Tester READ REVIEW

Best For Testing watch crystals: Buy: Hqdz gem hardness Tester READ REVIEW

Best For price: Buy: Dupeakya gem hardness Tester READ REVIEW

Best For blue topaz: Buy: Presidium gem hardness Tester READ REVIEW

Best primary Tester: Buy: Smartpro gem hardness Tester READ REVIEW

Best For identification assistance: Buy: Clina gem hardness Tester READ REVIEW

Best Easy To Use: Buy: Hqdz-Td gem hardness Tester READ REVIEW

Best Overall: HMKIS gem hardness Tester

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The hmkis gem hardness tester is specially designed for your daily purpose and has plenty of most useful features. This diamond tester is a great deal with the jewler scope and rechargable 9v included. It can tell you if a stone is a real diamond or not. It can be distinguished, the hardness of jade and diamond of different materials is different, and the equipment can be distinguished. It also comes in a cardboard storage box for extra protection.

It is easy to use and comes complete with understandable instructions and guides for every gem and size. The diamond tester helps to identify real and fake diamonds, as well as other jade. If even slightly tilted, it will give no reading or alert as diamond. This device is very helpful to separate the jewelry.

• Great and reliable source of authentification
• Come in a cardboard storage box for extra protection
• Easy to use, and fun worked well
• Easy-peas for someone who is not a jeweler to test their diamonds

Best For Testing watch crystals: Hqdz gem hardness Tester

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate tester. The hqdz gem hardness tester is exactly that - it's a simple tester that hits all the right notes. It only detects real diamonds and moissanite. It does test moissanite as a diamond, and sapphires goes up to level 7 on the tester but won't go all the way up. The instructions also mention it going off when it touches metal which is a buzzing sound vs. a 3 beeb tone for diamonds. This means you must touch the tip to the stone only when testing or it will beep the sound for metal detection which might throw you off if you don’t know that sound is for metal and not for a diamond. It is very easy to use and 100% accurate.

The test takes a few minutes, please turn off the power after the test is complete. It is a must have for jewelers.

• Great tool to have if you own any jewelry
• Perfect for testing on the go
• Great tester to verify real or not real
• Nice little tester good for testing jewelry

Best For price: Dupeakya gem hardness Tester

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The dupeakya gem hardness tester should be able to handle its purpose and duties with ease. This tester does test for various stones and is capable of detecting amethyst, garnet, topaz, and diamond. It is an electronic instrument designed and manufactured according to the thermal conductivity of diamonds to identify the true and false diamonds. It is extremely accurate and easy to use if you follow the instructions.

The tester differentiates between natural crystals and man made crystals "synthetic" like CZ's. The level wheel is a sensitivity selector. The tester uses heat conduction because the speed of heat conductance is proportional to the hardness of the stone. It comes with a soft case and small stone tray. This device works as long as you follow the instructions in the manual. It is great tool for a fast look at estate sales, no more guessing if it is glass or stone.

• Highly recommended for anyone who cannot afford to be fooled
• Gives a glass reading on all semi precious stones
• Man-made diamonds are flawless and beautiful
• Simple devise to help quickly determine authenticity of stone

Best For blue topaz: Presidium gem hardness Tester

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Next on the list, we've got yet another tester that manages to win our hearts. It's the presidium gem hardness tester and it's widely considered as tester that has the most suitable features. This is great for Peridot, Blue Topaz, and Aqua Marine gem stones. It is developed to distinguish between diamonds and its other simulants using the principles of thermal conductivity. It features the industry’s thinnest retractable probe tip. It allows you to touch the gem while avoiding the setting. It can be anything from a different stone that's been colored, all the way to colored/dyed glass. It's certainly not industrial grade equipment, but good for the jewelry collector/reseller/buyer.

This device is an excellent tool for anyone but a big plus for boutiques. Even with both tools, it takes a keen eye, and training to truly know what you're looking at. It comes with a soft case.

• Redesigned to be more compact, sturdy and portable
• Affordable, portable and easy to use, but has accuracy issues
• Good product, easy to calibrate and accurate
• Come in colors that can imitate a lot of natural stones

Best primary Tester: Smartpro gem hardness Tester

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Smartpro offers a variety of tester for personal choice and yet maintaining quality in all the variants. It is great for determining whether or not a gem is diamond, topaz, crystal glass, etc. It is a remarkable designed gemstone tester with color estimator display for smoothly and seamlessly testing your precious stone and diamond. It is heated electronically, while the other is cooled by the gemstone being tested. It can tell you the difference of blue topaz and aquamarine.

It is designed with USB connection to probe and very intuitive operation. While automatic shut off is a nice feature it does work kind of quickly. The ambient temperature in the office has to be at the very least 72 degrees for it to warm up. It is easy to use and not too difficult to understand.

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

Best For identification assistance: Clina gem hardness Tester

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate tester. The clina gem hardness tester is exactly that - it's a simple tester that hits all the right notes. A new portable high accuracy diamond tester diamond observation tool, you can use infrared irradiation in the diamond to evaluate the diamond. 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 ergonomically designed handle is comfortable to grip. 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 compact size is easy to use and portable to store. It is suitable for jewelry display or identification assistance. The High Accuracy Diamond Tester scattering effect of light is stronger.

• High accuracy diamond tester metal, simple calibration for stones of various sizes
• One of the new comers and featured product

Best Easy To Use: Hqdz-Td gem hardness Tester

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate tester. The hqdz-td gem hardness tester is exactly that - it's a simple tester that hits all the right notes. 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 comes with its own convenient carrying cases. The Hqdz-Td diamond tester pen is simple to operate to get results, professional(s) are not required. It provides 60x magnification to add to that comes with led lights and audio indication. There is a side pocket that holds the little metal piece that holds loose stones.

The pocket size is convenience to carry, so you can use it in everywhere and every time. It is fake crystal, a simulant such as cubic zirconium ( cz) will be no reaction. It comes in a convenient case that is soft but the end protects the probe rom getting damaged.

• Emits audible sounds to easily differentiate the readings
• A must for someone who has jewelry
• Designed for gems, jewelry, coins, stamps, rocks, watches, hobbies, antiques, models, photos industry, etc