10 Best Presidium Gemstone Testers: Unveiling the Finest Tools for Gemstone Identification

Are you tired of guessing if that stunning gemstone you just bought is genuine or a clever fake? Look no further! In this blog post, we will dive deep into the world of gemstone testing and reveal the best Presidium Gemstone Tester reviews. With these incredible devices, you can bid farewell to the uncertainty and become a confident gemstone connoisseur. Join us as we explore these cutting-edge tools and find out which one will be your ultimate gemstone guardian. Let’s begin our journey into the realm of dazzling authenticity!

Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

The Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) is a highly trusted gemstone tester that has been redesigned to be more compact, sturdy, and portable. With its sleek design, this gem tester is easy to handle and carry around, making it a convenient tool for gemstone identification on the go.

One of the standout features of the PGT II is its thinnest retractable probe tip in the industry. This innovative design allows for more precise testing on gemstones of different sizes and shapes, ensuring accurate results every time. Whether you’re dealing with small diamonds or larger moissanites, this gem tester is up to the task.

When it comes to reliability, the PGT II does not disappoint. With its assisted thermal calibration (ATC), this gem tester provides consistent and reliable results, giving you peace of mind in your gemstone identification process. It is capable of quickly and accurately identifying diamonds and moissanites, as well as common colored gemstones.

Using the PGT II is a breeze, thanks to its clear and easy-to-read analog dial. With just a glance, you can differentiate between 16 types of gemstones, saving you valuable time and effort. The simplicity and user-friendly interface of this gem tester make it suitable for professionals and beginners alike.

Pros:
– Compact, sturdy, and portable design
– Thinnest retractable probe tip for precise testing
– Assisted thermal calibration for consistent and reliable results
– Clear and easy-to-read analog dial for quick gemstone identification

Cons:
– Limited to the identification of diamonds, moissanites, and common colored gemstones
– Analog dial may require some familiarization before achieving accurate readings
– May not be suitable for advanced gemstone testing or grading purposes
– Requires occasional recalibration to maintain accuracy

Overall, the Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) is a reliable and user-friendly tool for identifying diamonds, moissanites, and common colored gemstones. Its compact and portable design, along with its precise retractable probe tip, make it a valuable asset for gemstone enthusiasts and professionals alike. However, keep in mind its limitations and the need for occasional recalibration to ensure accurate results.

Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones

The Presidium Instruments Gem Indicator (PGI) Handheld Tester is an industry-leading device designed for identifying diamonds and common colored gemstones. It utilizes thermal conductivity to indicate up to 31 different types of colored gems, and even features a color input function for more accurate results. With its easy-to-read digital LED screen, this handheld tester is both user-friendly and efficient.

One of the standout features of the PGI is its patented refined probe tip, which is the thinnest in the industry at just 0.45mm. This allows for testing gemstones as small as 0.02 carats, ensuring that no stone goes unnoticed. Additionally, this device also has the capability to distinguish diamonds from other colored gemstones, providing even further specificity in its results.

Powered by 3 x AAA alkaline batteries, the PGI can provide approximately 3 hours of continuous use. It also comes with a USB port, allowing for alternative power options when needed. The package includes the PGI device itself, a calibration disk, a USB cable, a quick guide, a QR code card, and a protective carrying case, ensuring that users have everything they need for accurate testing and convenient storage.

With its sleek chrome-brushed ergonomic grip and retractable thermoelectric probe tip, the PGI offers enhanced accuracy and ease of use. The clear digital LED screen makes it easy to read the results, and the color input function allows for precise separation of gemstones. Overall, the Presidium Instruments Gem Indicator (PGI) Handheld Tester is a versatile and reliable tool that provides intelligent and quick results for identifying diamonds and common colored gemstones.

High Accuracy Professional Diamond Tester Pen Jeweler Tool for Novice and Expert – Diamond Selector II 9V Battery Included(Black)

The High Accuracy Professional Diamond Tester Pen Jeweler Tool is a must-have for both novice and expert jewelers. With its intuitive design, this diamond tester is incredibly easy to use. The LCD display and LED indicator provide clear and accurate readings, while the large and small switches allow for testing diamonds of different sizes. Plus, it emits audible sounds to help differentiate between real and fake diamonds.

One of the standout features of this diamond tester is its simplicity. You don’t need to be a professional to operate it and get accurate results. All you have to do is turn on the diamond tester pen and lightly press the tip onto the gemstone. If the stone is fake, crystal, or cubic zirconia, the tester will not beep. This makes it a perfect tool for anyone in the jewelry industry, whether you’re a beginner or a seasoned expert.

In terms of convenience, the package includes everything you need to get started. It comes with the diamond tester pen, a leather pouch case for easy storage and transportation, a testing platform, a user manual for guidance, and even a standard 9V battery, so you can use it right out of the box. This product truly provides everything you need for accurate and reliable diamond testing.

Pros:
– Intuitive design with LCD display and LED indicator
– Simple to use, no need for professional assistance
– Package includes all necessary accessories and battery
– High accuracy in detecting real diamonds

Cons:
– Limited to testing diamonds only, not suitable for other gemstones
– Requires a standard 9V battery, which may need to be replaced over time

Experience the precision and convenience of the High Accuracy Professional Diamond Tester Pen Jeweler Tool. Whether you’re a novice or an expert, this tool is an invaluable addition to your jewelry testing kit. With its easy operation and reliable results, you can confidently assess the authenticity of diamonds and make informed decisions in the jewelry industry. Don’t settle for anything less than the best when it comes to diamond testing.

Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

The Presidium Instruments Gem Tester II (PGT II) is a powerful and reliable tool for gemstone identification. This instrument is based on the principles of thermal conductivity, which allows it to distinguish between diamonds and other simulants with ease. Developed by Professor Julian Goldsmid from the University of New South Wales in Australia, the PGT II provides a clear and direct analog display that separates up to 16 common colored gemstones based on their thermal conductivity.

One of the standout features of the PGT II is its retractable thermoelectric probe tip, which ensures constant pressure between the probe tip and the gemstone being tested. This feature is especially useful when testing small diamonds as small as 0.02ct. Additionally, the PGT II features the industry’s thinnest probe tip, measuring just 0.6mm. This allows for precise and accurate testing without damaging or scratching the gemstone.

When using the PGT II, you can expect consistent and reliable results every time. It is simple and easy to use, with a clear and easy-to-read analog dial that makes identifying gemstones a breeze. The PGT II is versatile and can differentiate between 16 types of gemstones, including moissanites.

While the PGT II is a highly effective gemstone tester, it’s important to note that it does not distinguish between natural and synthetic gemstones. This may be a drawback for those specifically looking to identify natural gemstones. However, considering its overall performance and reliability, the PGT II is still an excellent choice for gemologists, jewelers, and enthusiasts alike.

In conclusion, the Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) is a compact, sturdy, and portable gemstone tester that provides accurate and reliable results. Its thin retractable probe tip and versatile capabilities make it a top choice in the industry. While it may not distinguish between natural and synthetic gemstones, the PGT II is a valuable tool for identifying diamonds, moissanites, and common colored gemstones.

Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones

AN INDUSTRY LEADER
The Presidium Gem Indicator is an innovative handheld tester designed specifically for identifying diamonds and common colored gemstones. With its advanced thermal conductivity technology, this instrument can accurately indicate up to 31 different types of colored gems based on their thermal properties. One of its standout features is the color input function, allowing users to select from a range of 12 common colors, resulting in more precise and reliable results. The clear digital LED screen makes it easy to read and interpret the findings.
Compared to the previous Presidium Gem Tester/Colored Stone Estimator, the Gem Indicator offers enhanced convenience and portability. Its patented refined probe tip, measuring only 0.45mm in thickness, ensures accurate testing even for gemstones as small as 0.02ct. This retractable thermoelectric probe tip maintains constant pressure on the gemstone, guaranteeing accurate readings every time.
The Presidium Gem Indicator probe consists of two linked thermometers, one of which is heated electronically while the other is cooled by the gemstone being tested. By measuring the difference in temperature, it generates an electrical output that is amplified and displayed on the digital organic LED screen. This innovative design ensures quick and reliable results, guiding you in making intelligent decisions about your colored gemstones.

The Presidium Gem Indicator (PGI) features:

• Industry’s thinnest probe tip (0.45mm) for testing gemstones from 0.02ct or larger
• Patented refined probe tip for improved accuracy
• Ability to distinguish diamonds and moissanites from other colored gemstones
• Selection of 12 common colors available for more accurate identification
• Powered by 3 x AAA alkaline batteries for approximately 3 hours of continuous use
• USB port for alternative power source and ease of use

What’s included in your package:

• Presidium Gem Indicator
• Calibration Disk
• USB cable
• Quick Guide
• QR Code Card
• Protective carrying case

Pros:

• Thinnest probe tip ensures accurate testing of even small gemstones
• Color input function allows for more precise identification
• Clear digital LED screen for easy reading of results
• Distinguishes diamonds and moissanites from other colored gemstones
• USB port provides alternative power source and convenience

Cons:

• Battery life may be limited to approximately 3 hours of continuous use
• Only indicates up to 31 different types of colored gems
• May require periodic calibration for optimal performance

Overall, the Presidium Gem Indicator (PGI) is a dependable and user-friendly tool for accurately identifying diamonds and a wide range of common colored gemstones. Its compact size and sleek design make it easy to carry and use, while the advanced technology ensures accurate and reliable results. Whether you are a jeweler, gemstone enthusiast, or a novice in the industry, this handheld tester is an invaluable addition to your toolkit.

Presidium Duo Tester PDT Diamond Gemstone Tester

The is a cutting-edge tool that combines two proven testing methods for accurately identifying gemstones. With its unique ability to differentiate diamonds from their simulants based on both thermal conductivity and reflective indexes, this tester provides reliable results and peace of mind for gemstone enthusiasts.

One of the standout features of the Presidium Duo Tester PDT is its retractable probe tip, which ensures consistent pressure against the gemstone during testing. This attention to detail guarantees more accurate and reliable results. Additionally, with a probe tip size of only 0.6mm, this tester can handle gemstones as small as 0.02ct, making it one of the most versatile tools on the market.

The large easy-to-read analog dial of the Presidium Duo Tester PDT is another advantage. It displays 15 colored gemstones, allowing users to quickly and effortlessly identify a wide range of gemstone varieties. This intuitive interface makes the testing process simple and user-friendly, even for beginners.

While the Presidium Duo Tester PDT offers numerous advantages, it’s important to note that it does not differentiate between natural and synthetic colored gemstones. This could be a drawback for those specifically looking for a gemstone tester that can distinguish between the two. However, for general gemstone identification and diamond distinction, the Presidium Duo Tester PDT is unparalleled in its performance, providing consistent and reliable results every time.

In conclusion, the is a game-changer for anyone in the gemstone industry. Its unique combination of testing methods, along with its precision and ease of use, make it an indispensable tool for both seasoned professionals and hobbyists. Whether you’re a jewelry enthusiast or a gemstone collector, this tester is sure to enhance your gemstone identification process with its reliable and consistent results.

Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants

The Presidium Multi Tester III (PMuT III) is a versatile and reliable instrument that is a must-have for anyone involved in the gemstone industry. Its all-in-one design allows you to test diamonds, moissanites, and diamond simulants with ease and accuracy.

One of the standout features of the PMuT III is its easy-to-use design. With an ergonomic handheld design and a rubberized anti-slip grip, it fits comfortably in your hand, making testing a breeze. The lightweight and portable design, coupled with the convenient carrying case, make it perfect for on-the-go gemstone testing.

The PMuT III is equipped with the industry’s thinnest retractable probe tip, measuring just 0.6mm in size. This ensures consistent pressure against the gemstone during testing, resulting in more reliable and accurate results. With this incredible precision, the PMuT III can test colorless diamonds as small as 0.02ct, allowing you to confidently assess even the tiniest of gemstones.

The clear 180-degree multi-viewing LED display adds to the convenience of the PMuT III. It offers easy readability for both right and left-handed users, eliminating any guesswork during testing. This user-friendly instrument takes the guesswork out of gemstone identification, providing you with clear and reliable results every time.

While the PMuT III boasts numerous advantages, it is important to consider a few drawbacks. The instrument is powered by 3 AAA batteries, which may need to be replaced occasionally. Additionally, the PMuT III can only test for colorless diamonds and moissanites, limiting its capability to other gemstones. However, for those looking to test diamonds, moissanites, and diamond simulants, the PMuT III is an excellent choice, providing accurate and reliable results.

Presidium Adamas Diamond and Moissanite Tester Authenticating Diamonds

The Presidium Adamas Diamond and Moissanite Tester is truly the epitome of style and cutting-edge technology. This tester is perfect for anyone in the diamond industry or diamond enthusiasts who want to ensure the authenticity of their stones. What sets this tester apart from others on the market is its changeable probe tip. If your probe tip becomes worn or damaged, there’s no need to worry about equipment downtime. With the Adamas tester, you can easily replace the probe tip yourself, ensuring that you can continue testing without interruptions.

One of the standout features of this tester is its ability to authenticate colorless diamond melees as small as 0.01 carats. This is made possible with the special micro probe tip, which is available separately. The dynamic LED display provides clear and precise results, making it easy to determine the authenticity of your diamonds. Additionally, the sleek ergonomic grip and lightweight design make it comfortable to hold and use for extended periods.

The Adamas tester is powered by 3 AAA alkaline batteries, providing approximately 12 hours of continuous use. Alternatively, you can use the USB port with the included USB cable and Presidium Universal USB Power Adaptor. This versatility ensures that you’ll never be caught without power. Another convenient feature is the built-in memory chip, which can store up to 500 previous test records. This allows you to keep a thorough record of your tests for future reference.

Pros:
– Easy-to-use interchangeable probe
– Bright LED display for clear and precise results
– Sleek ergonomic styling for comfortable use
– Versatile power options with AAA batteries or USB cable and adapter
– Built-in memory for storing previous test records

Cons:
– The micro probe tip for authenticating small diamonds is available separately
– Batteries are not included in the package, requiring an additional purchase

Presidium Electronic Refractive Index Meter II

Unlike traditional refractometers, the (PRIM II) is a cutting-edge device that revolutionizes the gemstone identification process. With the ability to measure the range of refractive index (RI) values from 1.000 to approximately 3.000, this device encompasses a wide variety of gemstones including diamonds and moissanites. Say goodbye to the hassle and mess of using RI liquid, as the PRIM II offers a fast and easy test that provides accurate results.

One of the standout features of the PRIM II is its advanced software, which allows users to further narrow down the list of potential gemstones. By inputting known values such as color, hardness, and specific gravity (S.G.), the device can eliminate even more possibilities. Additionally, users can easily access detailed information about gemstone properties and common locations where they are found, making the identification process even more efficient.

The PRIM II offers a range of benefits that make it an indispensable tool for gemstone professionals. Here are some of its pros:

1. Continual elimination of possible gemstones: By utilizing various values such as R.I., color, hardness, and S.G., the PRIM II helps users rule out potential gemstones, saving time and effort.

2. Ideal for transparent gemstones: Designed specifically for testing transparent gemstones with flat polished surfaces, the PRIM II ensures accurate identification and efficient separation of gemstones in a parcel.

3. No need for RI liquid: Unlike traditional methods, the PRIM II does not require the use of messy RI liquid, making the identification process cleaner and more convenient.

4. Consistent and reliable results: With every test, the PRIM II delivers consistent and reliable measurements, allowing users to trust the accuracy of their findings.

The PRIM II also boasts a clear and visible display, making it easy to read and interpret measurements. It is compact and lightweight, with package dimensions of 6.2 x 4.3 x 2.8 inches and weighing a mere 7.2 ounces. Rest assured, this product is manufactured by Presidium, a renowned brand in the industry, and is available for purchase since June 1, 2012. In conclusion, the is a game-changer in gemstone identification, providing gemstone professionals with a reliable, fast, and efficient solution.

HMKIS Diamond Tester Pen, High Accuracy Jewelry Diamond Tester＋ 60X Mini LED Magnifying, Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter

The HMKIS Diamond Tester Pen is a must-have for both novices and experts in the world of jewelry. This handy tool helps you identify real and fake diamonds and even differentiate between other types of jade. With its intuitive design, you can easily spot the difference between genuine diamonds and imitations. When testing fake crystals such as cubic zirconium or glass, the diamond tester emits no sound or light, guaranteeing accurate results.

One of the standout features of this diamond tester is its fast and safe testing capabilities. Designed for quick and precise testing, it ensures no harm comes to your precious diamonds. This means you can confidently test your jewelry collection without worrying about damaging it. The tester’s thermal conductivity technology guarantees reliable results every time.

But the benefits don’t stop there. The HMKIS Diamond Tester Pen also comes with a Jewelers Loupe, allowing you to zoom in on the finest details of your diamond or jade. With a 60X LED magnification, this small microscope is perfect for examining gems, coins, antiques, stamps, and even for reading or inspection purposes. Its versatility makes it a valuable tool for any jewelry enthusiast or professional.

However, it’s worth noting that there are a couple of limitations to consider. First, it’s important to ensure that the battery temperature is higher than 10 ℃ to maintain optimal performance. Additionally, it is not suitable for testing metals. But despite these minor drawbacks, the HMKIS Diamond Tester Pen is a reliable and accurate tool that will undoubtedly elevate your diamond and jade testing capabilities.

Final Words

In conclusion, these 10 best Presidium gemstone testers have been unveiled, providing gemstone enthusiasts with the finest tools for identification. From the highly advanced Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) to the portable and handy Presidium Instruments Gem Indicator (PGI) Handheld Tester, these products offer accuracy and convenience in identifying diamonds, moissanites, and common colored gemstones. Whether you’re a novice or an expert, the High Accuracy Professional Diamond Tester Pen and the HMKIS Diamond Tester Pen provide reliable results. The Presidium Multi Tester III (PMuT III), Presidium Adamas Diamond and Moissanite Tester, and the Presidium Electronic Refractive Index Meter II offer versatility and authenticity. With these exceptional tools at your disposal, you can confidently authenticate and identify gemstones like a pro.