Best Diamond Tester In 2023 [Buying Guide]

Best Diamond Tester In 2023 [Buying Guide]

A diamond tester is a necessary tool for any retailer looking to ensure that the diamonds being purchased are what they say they are. Every diamond buyer must have a quality metal detector on hand to ensure their investment. And in this article, Byboe will show you the Best Diamond Tester on the market and several things to consider when shopping for your metal detector.

Best Diamond Testers on the Market in 2023

Best Diamond Testers on the Market in 2023

[amazon box=”B08MTG5NHJ,B0149N7EP2,B000TD3G8Q,B004QYR8U6,B009H4WGWK” template=”horizontal”]

1. Anbane High Accuracy Professional Diamond Tester

This portable electronic device can be used to quickly and accurately test diamonds. The carrying case for the diamond tester is easy to carry. The patient does not cause any damage or loss to the diamond.

A green indicator will be displayed on the jewelry diamond selector II tester if the stone is a genuine diamond. It will buzz continuously if the user accidentally touches metal.

After 10 minutes, the Moissanite tester will turn itself off. The green power diamond indicator light will flash, and long beeping sounds will notify the user to turn it off.

If you are looking for the best professional jewelry diamond tester, then it is for you. 


  • The price is well worth it.
  • This diamond selector tester is portable.


  • One customer reported that they did not receive the battery advertised.

2. StillCool Diamond Tester

This is the best accurate diamond tester for those looking for a portable and affordable device that can quickly distinguish natural diamonds from simulated stones.

Batteries power it, so it’s easy to use. The StillCool jewelry diamond tester will alert you visually and audibly if you are dealing with A genuine diamond.

For example, if you look at a fake crystal or any other form of stimulant, you will not experience any reaction. The handheld unit is easy to use and will give you the green light if the diamond is natural.

The simple switching mechanism allows it to be used with large and small-sized real diamonds. This StillCool unit is a reliable and accurate way to authenticate diamonds. You will receive a detailed instruction booklet to help you know how to use your new device.


  • Portable
  • Lightweight
  • It’s so simple
  • Sound and light indicators
  • This book is suitable for beginners.


  • It is not difficult to set up at first.
  • Batteries are not included.

[amazon box=”B08MTG5NHJ” template=”horizontal”]

3. Molo Diamond Tester+60X LED Magnifying Glasses Jeweler Tool Kit

Next, we have another jewelry diamond tester. This uses heat to verify the authenticity of the diamond. The tip can be placed on the diamond to determine the heat passing through it.

It will then indicate whether the diamond you are looking at is real or fake diamonds on the L.E.D. Light. You won’t hear any sound if the stone is artificial, a crystal, or cubic zirconia. Before using this machine, make sure you read the instructions.

The Molo Diamond Tester is an excellent choice over other products because it includes a few extras. You will need a 9V battery to use the diamond tester.

It also consists of a 60X magnifying glass to see the diamond in detail. Although it is not a professional magnifying glass, it is a great addition. It is seen as the best reasonable diamond tester. 


  • Relatively accurate
  • Portable
  • Compact
  • Competitively priced
  • Includes extras


  • It is not as precise as an electric tester.
  • Batteries don’t last for long.

4. MIUONO Diamond Tester

This tester is our best-rated diamond and gemstone tester. This pen is more precise and sophisticated, allowing you to identify if a diamond is genuine or fake diamonds quickly.

The magnifier and jewelry diamond tester come with convenient cases. It is non-destructive and precise, which allows it to confirm and speed up the verification of diamond quality. The jewelry diamond tester pen will have at least nine L.E.D. Lights, with a green indicator for genuine diamond.


  • It is simple to use the tester.
  • This tester gives you fast results.
  • This tester is portable.


  • One customer reported that the tester received had defected.

[amazon box=”B0149N7EP2″ template=”horizontal”]

5. Diamond Tester and 60X LED Magnifying Glasses Jeweler Tool Kit Combo

This combo is well worth the money! The York Diamond Tester Pen has L.E.D. Lights and an indicator. The L.E.D.s will turn on when the jewelry diamond detector detects the stone passes the test.

When the tests are complete, the jewelry Diamond Tester Pen will emit a beep sound and show a row of fully lit L.E.D.s. Each item can be carried in a convenient case, which allows them to be easily carried around in any bag or purse.

The combo of the jewelry Diamond Tester Pen + 60x led lighted loupe is an essential tool kit for anyone who plans to attend a garage sale or flea market.


  • It is simple to use the tester.
  • This tester gives you fast results.
  • The tester offers an intuitive design.


  • One customer reported that the tester quit working after being used a few times.

6. HMKIS Diamond Tester Pen

This diamond tester allows you to quickly and accurately test real diamonds. The diamond tester pen is simple to use and easy to explain.

If the crystal is not genuine, such as cubic zirconium, crystal, or glass, there won’t be any sounds or lights. This mini magnifier 60x led lighted loupe is made from A.B.S. plastic and features two bright L.E.D. Sunlight as well as a U.V. detecting lamp.

The L.E.D. Light can enhance visibility in dark environments and detect counterfeit currency notes. The 9V lithium battery can be charged via USB and used up to 1000 times.


  • The tester is long-lasting.
  • It is simple to use the tester.
  • The tester offers an intuitive design.


  • One customer reported that the light does not turn on for him.

[amazon box=”B000TD3G8Q” template=”horizontal”]

7. HDE Professional Diamond Tester

Our Best Choice product is an excellent product recommendation if you are looking for a simple, portable, and easy way to distinguish between fake and natural diamonds.

The HDE professional diamond tester can be charged with a standard battery and a quality leather case to protect it from damage. The HDE professional diamond tester is small enough to carry around, providing an accurate and instant reading.

This compact, professional-looking diamond tester costs a fraction of what a real diamond would cost. It can also provide peace of mind that the diamond you purchase is authentic.

It features a low battery indicator and emits an audible sound to distinguish between readings. There are small and large switches available for diamond testing.

The small portable electronic devices require only one 9V battery for operation and come with a small tray. This HDE portable, highly accurate, and the easy-to-use gadget is perfect for novices and experts.


  • Portable
  • Compact
  • Results are easy to understand
  • This book is suitable for both novice and expert users.
  • Affordable pricing


  • Requires batteries
  • Can not detect moissanite

8. Yult Professional Diamond Tester

This portable electronic device can be used to quickly and accurately test diamonds. The tester comes with a carry case and is portable.

It is portable and easy to use since false diamonds will not display or make any sound. If it is a genuine diamond, the light-up indicator will indicate.

The rope is made with high-quality ball bearings and won’t twist or tangle like other fitness ropes. You can skip it because of this. A tiny tray is included for holding stones and a bag with leather details.


  • It is simple to use the tester.
  • The tester is smooth, tangle-free, and easy to use
  • The tester delivers results very quickly.


  • One customer reported that the tester had broken after just a few uses.

[amazon box=”B004QYR8U6″ template=”horizontal”]

9. TekcoPlus Diamond Tester

The TekcoPlus diamond tester is not as expensive as the other options and only hits the middle-tier of jewelry diamond testers. However, not the most well-known brand globally; its quality and price make it a worthwhile investment.

Most professionals would avoid it due to its high price. Some professionals would prefer to have a few more options.

Despite this, the diamond tester is still the best tool I have found. It can detect moissanite and real diamonds as well as other metals.

My tests revealed that jewelry diamond testers at lower prices could not reliably and accurately check stones below 0.25cts. This is why TekcoPlus is so precise. It has a short battery life and a warm-up time of just half an hour.

TekcoPlus is the best choice if you are looking for a portable electronic device that caters to accuracy more than its features.


  • Accurate
  • Affordable
  • Clear display
  • Find diamonds and moissanite.


  • Generic brand

10. DANOPLUS Professional Diamond Moissanite Tester

This portable electronic device can identify gemstones smaller than 2mm and help you distinguish genuine diamonds from fakes. The L.E.D. Bar graphs can be adjusted via volume control to match stones of different sizes.

The tester features a metal detector which indicates if the setting is touched rather than the stone. This feature is not available on the real diamond testers, so other real diamond testers can detect a real diamond even though it’s fake.

This device has a rubber paint finish that gives it a nonslip, safe, and comfortable feel. DANOPLUS Professional Diamond Moissanite Tester also has an elastic tip probe that can be used to identify small stones.

Its compact size makes it easy to transport it wherever you need it. The search can also be used continuously for as long as 2 hours, and it heats up quickly in just 25 seconds. If you need the best diamond moissanite tester for your job, it is a deal item.


  • It is simple to use the tester.
  • This tester is reliable and accurate.
  • The tester has a nonslip design.


  • This tester has no cons.

[amazon box=”B009H4WGWK” template=”horizontal”]

11. RS Mizar Oris Terminator II Moissanite Tester

Our following recommendation for the best diamond tester category comes from R.S. Mizar. It’s their Oris Nelson Terminator Moissanite tester. O.N.E. is short for Oris Nelson Terminator Moissanite tester.

This small, portable device allows the user to distinguish between synthetic and Moissanite gemstones quickly. This unit uses thermal conductivity to provide both an audio and visual indicator of authenticity.

It is simple to use and requires that the probe tip be held against the stone. You will hear a continuous beep and a flashing green light to indicate what you are dealing with.

There is no downtime or waiting between tests. Your purchase includes both a probe cover and a loose stone holder.

The battery-powered device uses a 9-volt alkaline lithium battery with your O.N.E. testing kit. You will also find a low battery indicator. If you used asked that Does Moissanite Pass Diamond Tester? then let’s try with this machine. 

It is seen as the best diamond and moissanite tester on the market now.


  • Portable
  • Lightweight
  • Reliable
  • Sound and light indicators
  • This book is suitable for beginners.
  • There is no waiting period.
  • Low battery indicator


  • Only a 9V battery is required.
  • Only for Moissanite

12. Presidium Diamondmate Electronic Diamond Tester

The pocket-sized yet accurate, completely portable Presidium diamond test allows you to verify diamonds’ authenticity instantly.

This compact device, which is based on thermal conductivity, has a retractable probe tip that applies constant pressure to the gemstone’s surface being analyzed to give reliable results.

This probe is the most miniature industry and can check diamonds as small as 0.02 ct. The device emits a clear, audible beep and an L.E.D. Light signal to indicate the results.

The unit requires very little battery power, and there is no waiting period between tests. The team is powered by both rechargeable batteries and an A.C. adaptor.

Both are included in your purchase. It’s lightweight, portable, and easy to use. Your Presidium Diamondmate unit will be fully protected when it’s not in use. If you are looking for an upgraded diamond tester, it is for you. 


  • Instant verification
  • Use polished or unpolished diamonds.
  • You can expect consistent and reliable results.
  • It’s simple to use
  • Portable and lightweight
  • The clear, visible display
  • Protective carrying case included


  • Expensive

[amazon box=”B08F21JJGR” template=”horizontal”]

13. Cultj Diamond Combo Moissanite Tester

The Diamond Combo Tester can be used to distinguish colorless diamonds from Moissanite. It is reliable and accurate. The results can be heard thanks to the bright display and sound detection.

A single portable and ergonomic test can differentiate between colorless, Moissanite, and fake diamond based on thermal conductivity or electrical conductivity differences.

These tests can also distinguish low conductivity moissanite and colorless diamond. The probe has an alarm to sound when it comes in contact with metal and notice when soft.


  • It is simple to use the tester.
  • The price is well worth it.
  • The tester ensures a solid design.


  • This tester has no cons.

14. Best Low-End Electric Diamond Tester-Presidium II

Presidium’s Gem Tester II is more compact, lighter, and durable than its predecessor. The features are more suited for professionals ideal for auctioneers and other professional users.

The thermoelectric tester relies on heat to produce its results. Although it is less precise than electricity, the tester still provides accurate results with transparent analog displays. 

It can be used on diamonds, Moissanite, and 16 other stones. This allows for a wide range of diamond testing options.

Built-in calibrations are available in the new design and can be used indoors or outdoors. The retractable tip is the smallest on the market for real diamond testers, allowing you to test stones as small as 0.02 carats.

I was pretty comfortable with the decision to invest in the Presidium Gem Tester II because of its precise results and no waiting time.


  • Stones can be polished or unpolished.
  • Consistent
  • Can use A.A. batteries
  • Useful for smaller stones


  • Costly

[amazon box=”B07MPFCD74″ template=”horizontal”]

15. GemOro Diamond Tester 

The Ultratester by GemOro is one of my favorite and most accurate devices. Its patented design features a sleek and ergonomic handheld design that makes it easy to carry and use. The device is versatile and can test multiple gemstones in addition to diamonds.

The tip glows, and the cone indicator uses a simple red/green system for authenticity. An L.E.D. A diamond illuminator is included for better visibility and an audible warning. The device can easily detect white sapphires, diamonds, metals, and Moissanite.

The probe is strong and covered with a spring-loaded cap. It takes only 10 seconds to warm up between tests. 

The auto-off function saves battery when not in use. GemOro’s user-friendly design is a plus, as well as its top quality.


  • Quick warming
  • Steady, covered tip
  • Comfortable grip
  • High quality


  • The cone indicator may malfunction.
  • Costly

16. Presidium Adamas

The Presidium Adamas can accurately measure diamonds as small as 0.02 carats. The microtip allows for 0.01-carat accuracy. This is something I can see in jewelry and actions.

You can replace or repair the probe tip at any time, as they are easily adjustable. This is very useful as replacing the information is much more expensive than buying new diamond testers. It is beneficial to test simulants, diamonds, and Moissanite.

The tip can also be charged via USB. The device can be carried around easily and set in almost any place. 

The best feature is the built-in memory chip, which can hold up to 500 test amounts. The Adamas is an excellent choice if you are willing to spend a lot.


  • Accurate
  • Portable and lightweight
  • Dual power source
  • Built-in memory chip


  • Costly

[amazon box=”B010L7IMQ0″ template=”horizontal”]

diamond tester best for money What Are Diamond Testers Exactly

What Are Diamond Testers Exactly?

Jewelers typically own these handy electronic diamond detectors. A jeweler diamond tester can be used to confirm that diamonds are genuine. It is small and portable to carry around with you.

You can place the tiny tip of the device on the stone. A distinctive sound or visual cue will clarify the stone’s clarity.

Most real diamond testers use the basics of thermal conductivity. Different substances have different heat conduction properties.

Diamonds are no exception. High-accuracy diamond testers may also use electrical conductivity as an alternative to thermal.

If you would like to learn more about how do diamond testers work, you can click on this youtube video

How to Select the Best Diamond Tester

How to Select the Best Diamond Testers

Two main factors make it easier for pros and beginners to select the right product.


You will find a variety of models in our guide, as well as those found on similar principles. Presidium brands are trendy in the jewelry market.

But I won’t just suggest brands. This is why it’s essential to research the quality of products and brands to get fair and accurate information.


When shopping for diamond testers, you should be prepared to spend on various prices, from the affordable to the more expensive.

Easy to use

A small and easy tester is a good choice for beginners. It will save you time and focus on analysis and setup.

Many devices have visual and sound cues, so they are ready to use immediately. If you are more interested in being an analyst at busy auctions, then it’s a good idea to choose portable, pocket-sized devices.


Diamond testers can use either heat or electricity to determine which type of conduction they are using. Which is better?

Out of both, electric conduction diamond testers outperform those using heat conduction. Although they can be more costly, you get better results. The heat diamond testers are more affordable, making them useful for limited budgets.


You want to make sure you get a quality product that will last. You want a durable unit with a high-quality build.

You might consider purchasing a jeweler diamond tester with a protective probe tip, or at least a case that can securely store your tester while it is not being used or in transit.


Although battery-powered is an excellent option for portability, you should also consider whether you prefer a secondary power source or a USB charging option. A diamond tester powered by rechargeable batteries might be an intelligent choice.


Your jewelry tester must be accurate and reliable. This is the most crucial aspect to consider when purchasing a diamond or gemstone tester. Make sure you thoroughly read all reviews and information before making a purchase.

Best Portable Diamond Tester FAQs

Best Portable Diamond Tester FAQs

Is Presidium a Reliable Brand?

It is a top-rated brand and the diamond tester of choice. However, it is also known for its outstanding service.

Which Diamond Tester Is the Most Affordable and Powerful?

My favorite option is the Presidium Multi-Tester III (PMuT III), All-In-One Tool for Testing Diamonds, Moissanites, and Diamond Simulants. It’s also one of the most affordable.

Are There Any Deals?

Some of the options listed in this article are available at a discount price. To find out more, please visit the product listing.

Which Brands Should I Be Looking at When Buying?

My top five brands are based on my research: Presidium SmartPro, Presidium, and StillCool 

Do I Purchase It Online or in an Offline Shop?

Online shopping offers several advantages, including a lower price and faster delivery. If you are in a rush or can find the product at a lower price in an offline store, consider shopping online.


The diamond tester is the ideal, easiest to use, and gives the most accurate results. Of course, there are other factors, such as the detector’s price and the operating cost, but the diamond tester is more important than that. We hope that you can find a suitable tester machine on our list.

Leave a Reply

Your email address will not be published. Required fields are marked *