Presidium PGT Electronic Diamond Tester - Accurate Gemstone Identification

Condition: Appears Brand New, Open Box, All Pieces Included, Tested, Works

The Presidium PGT Electronic Diamond Tester ensures accurate gemstone identification in seconds. This portable device tests diamonds, moissanites, and many other colored gemstones. The advanced thermal conductivity system improves reliability for both professionals and hobbyists.

The PGT tester stands out as an essential diamond tool for jewelry experts and collectors. Its precise probe tip helps verify loose or set stones while minimizing errors. This tool measures how well gemstones conduct heat, which is a key difference between diamonds and other stones like moissanite or sapphire. The analog dial displays fast results and is easy to read during quick testing sessions.

This tester features a retractable thermoelectric probe tip, which gives even pressure every time. The probe measures only 0.6mm, so you can test gemstones as small as 0.02 carats. That’s unique in the gem-testing world. The built-in metal alert buzzer stops mistakes by warning if you touch the metal part of jewelry instead of the stone. With durability in mind, the unit uses high-quality parts and features a replaceable probe tip. This means you can maintain top accuracy over time without replacing the whole product.

Portability is a major benefit of the Presidium PGT. It is lightweight and works with either two AA batteries or the included adaptor. The sturdy leather carrying case shields your device from dust and bumps while traveling. This makes the tester perfect for busy jewelry shops, on-site tradeshow booths, or simply moving between home and office.

The clear analog dial simplifies results. Marked zones on the dial correspond to common gemstones. The built-in glass and calibration test discs make it easy to keep the tool tuned and accurate. Since the PGT doesn’t require waiting between tests, you can move quickly from one piece to the next, keeping workflows efficient.

Regular calibration is important to ensure continued accuracy. The PGT tester includes glass and metal reference discs for this. Gemologists appreciate the tester’s reliability after shipping or temperature changes. You can always check and recalibrate as needed, minimizing doubts and boosting confidence in your results.

Using the Presidium PGT is straightforward. The retractable probe design prevents excessive force during testing, which protects fragile stones and delicate settings. Even if you’re working with antique rings or small earrings, the thin tip makes it easy to verify authenticity without damage.

Whether you need fast confirmation of a gemstone’s identity at the counter or detailed examination in the lab, this tester delivers consistent performance. Its multi-gem detection covers most jewelry stones found in daily work, from rubies to sapphires and topaz. Jewelers, pawnbrokers, and collectors all benefit from its trusted results and simple operation.

Frequently Asked Questions (FAQ)

• Question: How exactly does the Presidium PGT tell diamonds apart from moissanites?
  Answer: The Presidium PGT measures how quickly heat travels through each stone. Diamonds transfer heat much faster than moissanites. When you test a gemstone, the probe senses this thermal conductivity and the tool displays where the stone sits on the analog scale. This makes distinction clear, even though these stones look similar to the eye. This process helps both new and experienced users feel confident about their findings, especially when testing rings that may mix diamond and moissanite side-by-side.
• Question: Can I use the Presidium PGT to test gemstones set into jewelry, like rings and bracelets?
  Answer: The tester is specifically designed to handle loose and mounted gemstones. The retractable probe applies even pressure, and the clever buzzer warns if you accidentally touch the metal setting instead of the gem. This makes it very safe for use with vintage or delicate jewelry items. It also means you can check authenticity without removing a stone, saving time and reducing risk for both sellers and buyers. Many jewelry professionals rely on this feature for day-to-day appraisals and buying events.
• Question: What is the smallest gemstone the device can accurately test?
  Answer: Thanks to its industry-leading 0.6mm probe tip, the PGT can test stones as small as 0.02 carats. This extremely thin probe is perfect for tiny melee diamonds or micro-set stones. It works well on both loose stones and intricate pieces. Many devices on the market cannot handle such fine work, but the PGT’s thin tip is ideal for small accent stones in high-end jewelry or custom settings.
• Question: How frequently do I need to calibrate the Presidium PGT?
  Answer: Calibration is key for accuracy, particularly if your device gets bumped, changed environments, or after long storage. Use the glass and metal discs included with the tester to recalibrate before any big appraisal session or public event. Many professionals do a quick calibration weekly or after temperature changes. Regular maintenance guarantees ongoing, dependable results for years.
• Question: Is this tester able to identify if my gemstone is synthetic or natural?
  Answer: The Presidium PGT identifies gemstones by their heat conductivity. Synthetic stones usually share the same thermal properties as their natural forms. This means the tester does not distinguish between natural and lab-created stones. If you need to check gemstone origin, pair the PGT with other advanced laboratory tests. For basic jewelry inspections, the PGT gives quick and accurate results regarding gemstone type, not the source.

Get more from your gemstone testing routine with this dependable Presidium device. Discover helpful tips, trusted research, and advanced guides at the Gemological Institute of America (GIA) for expanded knowledge. If you want to browse more gemstone-testing tools, see our personal-care Collection for curated solutions.

Keywords: Presidium, PGT, diamond, tester