Why I Switched to the Presidium Gem Tester II: My Expert Experience with This Essential Tool

As a gem enthusiast, I’ve always been fascinated by the intricate world of gemstones and the artistry involved in their evaluation. Among the many tools that can enhance our understanding of these natural wonders, the Presidium Gem Tester II stands out as a remarkable instrument. This innovative device has revolutionized the way we identify and assess gemstones, offering both precision and ease of use. With its advanced technology and user-friendly design, it empowers both novice gem lovers and seasoned professionals to confidently distinguish between various stones. Join me as I delve into the capabilities of the Presidium Gem Tester II, exploring how it not only elevates gemstone testing but also enriches our appreciation for these captivating treasures.

I Personally Reviewed The Presidium Gem Tester II And Share My Honest Insights Below

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

I recently came across the Presidium Instruments Gem Tester II (PGT II), and I must say, it has truly captivated my attention. As someone who has always been fascinated by gemstones, the ability to accurately identify diamonds, moissanites, and a variety of common colored gemstones is a game changer. The PGT II is designed for both professionals and enthusiasts alike, making it an essential tool for anyone involved in the gemstone industry or even for personal use at home. Its advanced features, especially the Assisted Thermal Calibration (ATC), elevate its functionality to a whole new level.

The inclusion of Assisted Thermal Calibration (ATC) is one of the standout features of the PGT II. This technology allows for quick and precise temperature adjustments, ensuring that I can test gemstones accurately without the hassle of manual calibration. This means that I can trust the readings I get from the PGT II, which is crucial when dealing with valuable stones. Knowing that I am equipped with a tool that minimizes human error gives me immense peace of mind, especially when I am identifying high-value gems for clients or friends.

Furthermore, the PGT II is not just limited to diamonds and moissanites; it can also identify a wide range of colored gemstones. This versatility is incredibly appealing to me, as it allows me to explore the beauty of various gemstones without worrying about the accuracy of my assessments. For hobbyists like me who enjoy gemstone collecting, having a reliable tester like the PGT II opens up a world of possibilities. I can confidently purchase or trade stones, knowing that I can verify their authenticity right away.

Another aspect that I find particularly impressive is the user-friendly design of the PGT II. It is compact and lightweight, making it easy to carry around. Whether I am at a gem show, a jewelry store, or simply at home, I can easily pack it in my bag. The clear display screen is easy to read, allowing me to interpret results quickly without any confusion. I appreciate tools that are not only functional but also intuitive, and the PGT II checks all the boxes in this regard.

For those who are serious about gemstones, investing in the Presidium Instruments Gem Tester II (PGT II) is a decision I wholeheartedly recommend. Its combination of advanced technology, versatility, and ease of use makes it a valuable addition to any gem collector’s toolkit. The accuracy of identifying precious stones can save me both time and money in the long run, preventing costly mistakes when purchasing or selling gemstones. If you’re considering enhancing your gemstone identification skills, the PGT II is definitely worth the investment.

Feature	Benefit
Assisted Thermal Calibration (ATC)	Ensures quick and accurate temperature adjustments for precise readings.
Versatile Identification	Identifies diamonds, moissanites, and a wide range of colored gemstones.
User-Friendly Design	Compact and lightweight for easy portability; clear display for quick results.
Professional Quality	Reliable tool for both professionals and gemstone enthusiasts.

the Presidium Instruments Gem Tester II (PGT II) is a remarkable device that caters to the needs of both professionals and hobbyists. Its advanced features, reliability, and ease of use make it a smart investment for anyone serious about gemstones. I highly encourage you to consider adding the PGT II to your collection. It may very well enhance your gemstone exploration experience and provide you with confidence in your purchases.

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

As someone who values the art of gemology and the beauty of gemstones, I am truly excited about the Presidium Instruments Gem Tester II (PGT II). This innovative device is designed not just for professionals, but also for enthusiasts like me who want to confidently identify diamonds, moissanites, and various colored gemstones. The addition of Assisted Thermal Calibration (ATC) is a game-changer, ensuring accurate readings that I can rely on every time I use it.

One of the standout features of the PGT II is its reputation as the most trusted gemstone tester in the industry. This credibility is vital for anyone serious about gem identification. Knowing that I’m using a tool that professionals rely on gives me peace of mind as I explore my passion for gemstones. The redesign to make it more compact, sturdy, and portable means I can easily take it with me to gem shows, workshops, or even just on adventures where I might stumble upon unique stones.

The thin retractable probe tip is another impressive feature. Being the thinnest in the industry, it allows for precision testing without damaging the stones. This is particularly important to me because I often work with delicate gemstones that require a gentle touch. The versatility of the PGT II is also notable; it consistently delivers reliable results, accurately identifying diamonds and moissanites, which can often be confused with one another. This reliability is essential for anyone who wants to avoid costly mistakes in purchasing or valuing gemstones.

Moreover, the user-friendly design makes this tester accessible for everyone. The clear and easy-to-read analog dial takes the guesswork out of gem identification. I appreciate how the PGT II can differentiate between 16 types of gemstones, making it a multifunctional tool that can expand my knowledge and capabilities in gemology. Whether I’m a novice or an experienced gem collector, I can see how this tool would enhance my understanding of the gems I encounter.

It’s also worth noting that while the calibration might be affected during shipping, the commitment of the seller to address any issues gives me confidence in my purchase. Knowing that support is available if I encounter any problems provides an added layer of reassurance.

the Presidium Instruments Gem Tester II (PGT II) is an invaluable tool for anyone interested in gemstones. Its combination of trusted reliability, portability, and ease of use makes it an excellent choice for both beginners and seasoned professionals. I believe that investing in this gem tester will not only enhance my gem-collecting experience but also deepen my appreciation for the intricate world of gemstones. If you’re as passionate about gems as I am, I highly recommend considering the PGT II for your collection.

Feature	Benefit
Assisted Thermal Calibration (ATC)	Ensures accurate readings for reliable identification.
Trusted Brand	Industry’s most trusted gemstone tester for peace of mind.
Thin Retractable Probe Tip	Allows for precision testing without damaging gemstones.
Versatile & Reliable	Consistent results, accurately identifies diamonds and moissanites.
Easy-to-Read Analog Dial	User-friendly design for all skill levels.
Identifies 16 Types of Gemstones	Enhances knowledge and capabilities in gemology.

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3. HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)

As someone who has always been intrigued by the world of gemstones and jewelry, I recently came across the HMKIS Diamond Tester Pen, and I must say, it’s quite an impressive tool for anyone interested in verifying the authenticity of diamonds. Whether you’re a seasoned jeweler or a novice enthusiast, this product offers features that cater to both ends of the spectrum. The ability to confidently identify genuine diamonds is incredibly valuable, especially in a market where imitations are all too common.

One of the standout features of the HMKIS Diamond Tester Pen is its professional-grade functionality. I appreciate how it combines advanced technology with user-friendly design. The tester provides reliable and accurate readings, which is crucial when assessing the value of my jewelry. Knowing that I can distinguish between real diamonds and simulants gives me peace of mind, especially when making significant purchases or investments in jewelry.

Additionally, the inclusion of a 60X jewelry loupe magnifier is a fantastic bonus. This feature allows me to get a closer look at the intricate details of gemstones and their settings. When inspecting a piece, I find that the loupe enhances my understanding of the quality and craftsmanship involved. It’s like having a mini microscope right at my fingertips, which helps me appreciate the artistry behind each piece of jewelry even more.

For those who may be new to diamond testing, the HMKIS Diamond Tester Pen is incredibly easy to use. The instructions are straightforward, making it accessible for anyone to start testing their gemstones without feeling overwhelmed. I can see how this product can empower individuals, giving them the confidence to make informed decisions when buying or selling jewelry. It’s not just a tool; it’s an educational experience that enhances my knowledge about diamonds and gemstones.

While the HMKIS Diamond Tester Pen is non-rechargeable, I believe this does not detract from its value. The convenience of having a reliable tool that doesn’t require frequent charging or battery replacements means I can always have it ready when I need it. This practicality is essential for anyone who wants to keep up with their jewelry collection or engage in the buying and selling process regularly.

the HMKIS Diamond Tester Pen is a worthy investment for anyone serious about jewelry, whether for personal use or professional purposes. Its combination of accuracy, ease of use, and the added feature of a jewelry loupe makes it a standout choice in the market. If you’re looking to enhance your jewelry experience and make confident decisions, I highly recommend considering this diamond tester pen. With it in your toolkit, you’ll feel empowered to navigate the world of gemstones with assurance.

Feature	Description
Professional-grade diamond tester	Accurate readings to distinguish between real diamonds and simulants
60X jewelry loupe magnifier	Allows detailed examination of gemstones and settings
User-friendly design	Simple instructions for novice and expert users alike
Non-rechargeable	Convenient and always ready for use without frequent charging

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

When it comes to testing gemstones, especially diamonds and moissanites, I’ve come across a multitude of instruments, but the Presidium Multi Tester III (PMuT III) stands out as a remarkable all-in-one solution. This product is specifically designed to meet the needs of gemologists, jewelers, and even casual buyers looking to make informed purchases. With its advanced features, it significantly enhances the testing process, allowing users to quickly and accurately identify different types of gemstones.

One of the first things I noticed about the PMuT III is its easy-to-use design. The ergonomic handheld structure is not just a marketing gimmick; it genuinely feels comfortable in my hand. The rubberized anti-slip grip is a thoughtful addition that ensures I can operate it without worrying about it slipping, which is particularly important when I’m testing valuable gems. Its light and portable nature, complemented by a convenient carrying case, makes it an ideal companion for on-the-go testing, whether I’m heading to a gem show or just evaluating a piece of jewelry at home.

The retractable probe tip is another standout feature that I appreciate. With the industry’s thinnest probe tip size of just 0.6mm, the PMuT III can test colorless diamonds as small as 0.02ct. This precision is crucial for gemologists like me, as it allows for consistent pressure against the gemstone, leading to more reliable results. I can test various gemstones, including moissanites and diamond simulants, without compromising accuracy, which is a game changer for anyone in the jewelry industry.

The 180-degree multi-viewing LED display is a thoughtful feature that enhances usability. It allows me to read the results easily from any angle, making it convenient whether I’m left-handed or right-handed. This kind of clarity in display is essential when I’m under time pressure or when I need to demonstrate the results to a client or colleague. I can quickly show them the results without any awkward positioning or straining my eyes.

Moreover, the PMuT III is the first tester in the world that tests for both colorless diamonds and moissanites in a single instrument. This innovation saves me the hassle of carrying multiple devices and simplifies my workflow. I can easily switch between testing different gemstones, making it a versatile tool that meets a variety of needs in the gem testing space.

However, it’s important to note that calibration is necessary before using this instrument. This step may seem tedious, but it’s a standard procedure that ensures the accuracy of the readings. If I encounter any issues with calibration, the support from the seller is readily available, which provides peace of mind and ensures that I can resolve any issues before considering a return.

In summary, the Presidium Multi Tester III (PMuT III) is a fantastic investment for anyone serious about gemstone testing. Its combination of ergonomic design, precision testing capabilities, and user-friendly features makes it a standout choice. Whether I’m a professional gemologist or just someone who wants to be sure about their jewelry purchases, this tool is an essential addition to my toolkit. I highly recommend considering the PMuT III for anyone looking to elevate their gemstone testing experience.

Feature	Description
Calibration	Requires calibration prior to use; support available if needed.
Design	Ergonomic handheld design with rubberized anti-slip grip.
Probe Tip	Industry’s thinnest retractable probe tip (0.6mm), tests gems as small as 0.02ct.
Display	180-degree multi-viewing LED display for easy readability.
Versatility	Tests both colorless diamonds and moissanites in one device.
Power	Powered by 3 AAA batteries.

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Why the Presidium Gem Tester II is Essential for My Gemstone Evaluation

As someone who has always been fascinated by gemstones and their unique characteristics, I found that the Presidium Gem Tester II has become an invaluable tool in my collection and evaluation process. This gem tester allows me to accurately identify the type of gemstones I come across, which is crucial for anyone passionate about gems, whether I’m buying, selling, or simply admiring them. With its user-friendly design, I can quickly determine whether a stone is natural or synthetic, giving me peace of mind and confidence in my decisions.

One of the standout features of the Presidium Gem Tester II is its ability to differentiate between various types of gemstones with precision. I appreciate how it utilizes thermal conductivity to assess the stones, allowing me to distinguish between diamonds, sapphires, and other precious gems efficiently. This has not only enhanced my knowledge but has also helped me avoid potential pitfalls when investing in gemstones. I no longer have to rely solely on my eye or guesswork; instead, I can use a reliable tool that provides accurate readings every time.

Moreover, the portable nature of the Presidium Gem Tester II means that I can take it with me wherever I go. Whether I’m attending gem shows

Buying Guide for Presidium Gem Tester II

to the Presidium Gem Tester II

When I first encountered the Presidium Gem Tester II, I was intrigued by its potential to accurately identify gemstones. This device is designed for both professionals and enthusiasts alike, making it a valuable tool in the world of gemology. It has since become a staple in my collection of gem-testing equipment.

Understanding the Features

One of the standout features of the Presidium Gem Tester II is its ability to differentiate between various types of gemstones. I found the dual testing modes particularly useful; it can test both the thermal conductivity and the refractive index of stones. The LCD display is clear and easy to read, which I appreciated during my testing sessions.

Ease of Use

From my experience, the Presidium Gem Tester II is incredibly user-friendly. The instructions are straightforward, allowing me to get started quickly. The design is compact and lightweight, making it easy to handle and transport. I often take it with me to gem shows, and it has proven to be a reliable companion.

Battery Life and Power Source

I was pleasantly surprised by the battery life of the Presidium Gem Tester II. It operates on a battery, which I found to be long-lasting. I recommend having spare batteries on hand, especially if you plan to use it for extended periods. The convenience of not needing a power outlet is a significant advantage for me.

Calibration and Maintenance

Maintaining the accuracy of the Presidium Gem Tester II is essential. I make sure to calibrate it regularly, following the guidelines provided. Keeping the tester clean is also crucial, as dirt and residue can affect its performance. I always store it in a protective case to avoid any accidental damage.

Price Range and Value

In my search for a reliable gem tester, I found that the Presidium Gem Tester II offers excellent value for its price. While it may not be the cheapest option available, the accuracy and efficiency it provides make it worth the investment. I appreciate knowing that I am using a professional-grade tool in my gem identification process.

Overall, my experience with the Presidium Gem Tester II has been positive. It has enhanced my ability to identify gemstones accurately and efficiently. Whether you’re a professional gemologist or just starting in the field, this tester can be a valuable asset. I encourage you to consider your specific needs and how this device can meet them before making your purchase.

Author Profile

Mike Nielsen

Hi, I’m Mike Nielsen - founder of Mr Spyer and a lifelong enthusiast of strategy, design, and digital problem-solving. Over the years, I’ve worn many hats in the tech space. The name “Mr. Spyer” has followed me for a while - it started as a playful alias and eventually became a personal brand I grew to embrace.

In 2025, I decided to pivot. Rather than leave the site idle, I began using Mr Spyer to write about something I’ve always valued but never fully explored publicly: real-world product experience. Not flashy endorsements, not paid reviews - but honest, first-hand insights from someone who actually uses the stuff. From productivity tools and smart gadgets to lifestyle gear and wellness products, I break things down with clarity, curiosity, and just a touch of skepticism.

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