--- product_id: 40181311 title: "Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones" brand: "presidium" price: "2564 zł" currency: PLN in_stock: true reviews_count: 10 category: "Presidium" url: https://www.desertcart.pl/products/40181311-instruments-gem-indicator-pgi-handheld-tester-for-identifying-diamonds-common store_origin: PL region: Poland --- # LED screen with 31 gemstone tests Thinnest retractable probe tip for precision Results in under 6 seconds Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones **Brand:** presidium **Price:** 2564 zł **Availability:** ✅ In Stock ## Summary > 💎 Identify gems like a pro—fast, precise, and effortlessly sleek. ## Quick Answers - **What is this?** Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones by presidium - **How much does it cost?** 2564 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/40181311-instruments-gem-indicator-pgi-handheld-tester-for-identifying-diamonds-common) ## Best For - presidium enthusiasts ## Why This Product - Trusted presidium brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ergonomic & Portable:** Sleek chrome-brushed grip with USB power option for on-the-go professionals. - • **Crystal Clear Readouts:** Bright digital LED screen makes results instantly readable—no guesswork needed. - • **Speedy Gem Verification:** Get accurate gemstone ID in less than 6 seconds—because your time is precious. - • **Precision Probe Technology:** Ultra-thin retractable tip ensures consistent pressure and pinpoint accuracy every time. - • **Color Input Differentiation:** Advanced color input function separates gemstones with laser-like precision. ## Overview The Presidium Instruments Gem Indicator (PGI) is a handheld, ergonomic tester designed specifically for identifying diamonds and 31 common colored gemstones. Featuring the industry's thinnest retractable thermoelectric probe tip, it delivers quick, reliable results in under 6 seconds displayed on a clear LED screen. Its advanced color input function enhances gemstone differentiation, making it an essential tool for jewelers and gemologists seeking precision and portability. ## Description desertcart.com: Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones : Arts, Crafts & Sewing Review: Testing gemstones - Excellent Seller! Purchase a Presidium gemstone tester! I love it! Thank you! Review: Inaccurate - worked for less than a year before it became unusable - It worked for less than a year. For the price point, it should be way better quality. It now reads “slip detected” constantly - even when it’s not against the stone yet. It’ll provide a reading before the tip has touched the stone. You can test the same stone twice to multiple different results. Save your money & buy any other machine to help you out. ## Features - INDUSTRIES MOST TRUSTED | The only handheld tester specifically for colored gemstones; Quick results in less than 6 seconds. - THINNEST RETRACTABLE PROBE TIP | Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone, for enhanced accuracy. - VERSATILE AND RELIABLE | Color input function to further separate gemstones for more precise results. - EASY TO READ | Results are on a clear digital LED screen; Tests an extended range of 31 different gemstones. - ERGONOMIC | Sleek chrome-brushed ergonomic grip; USB port for alternative power and handheld for convenience. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06X979666 | | Best Sellers Rank | #199,088 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #83 in Jewelry Diamond Testers | | Customer Reviews | 3.8 3.8 out of 5 stars (55) | | Date First Available | June 3, 2016 | | Is Discontinued By Manufacturer | No | | Item Weight | 11.2 ounces | | Item model number | PGI | | Manufacturer | PRESIDIUM | | Package Dimensions | 8.1 x 3.4 x 2.4 inches | ## Images ![Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones - Image 1](https://m.media-amazon.com/images/I/71SIZ1xbSgL.jpg) ## Questions & Answers **Q: how does it identify the gemstones as i see nowhere it will show anything in the above photo** A: You would place the probe tip against the stone you are testing, select the color of the stone in the window, and the tester will identify what it is. The screen is small, but all the information you need will be there **Q: Where can I find a list of the 31 gemstone this item can detect?** A: Glass, Iolite, Almandine, Pyrope, Spessartite, Aquamarine, Emerald, Goshenite, Helidor, Morganite, Tanzanite, Nephrite, Peridot, Jadeite, Paraiba, Rubellite, Tourmaline, Demantoid, Hessonite, Tsavorite, Chrysoprase, Amethyst, Aventurine, Citrine, Quartz, Spinel, Chrysoberyl, Topaz, Ruby, Sapphire, Diamond **Q: Can you test mounted stones?** A: You can test all kinds of stones! Loose, mounted, cracked, clear and even cloudy!!! **Q: Can it tell the difference between genuine diamonds and synthetic diamonds ?** A: Hello, No, it can not. It simply identifies the stones ## Customer Reviews ### ⭐⭐⭐⭐⭐ Testing gemstones *by L***. on January 13, 2026* Excellent Seller! Purchase a Presidium gemstone tester! I love it! Thank you! ### ⭐ Inaccurate - worked for less than a year before it became unusable *by B***A on August 22, 2025* It worked for less than a year. For the price point, it should be way better quality. It now reads “slip detected” constantly - even when it’s not against the stone yet. It’ll provide a reading before the tip has touched the stone. You can test the same stone twice to multiple different results. Save your money & buy any other machine to help you out. ### ⭐⭐⭐⭐⭐ A good Useful Tool to have *by A***A on April 28, 2025* Great tester, as other reviews have stated You have to have some Knowledge of Gemstones while using this pen which I had no problem with, you can go on the Presidium Website and Download the Spreadsheet of Gems if you’re not sure. As far as Diamond if I wasn’t holding the pen straight and at an angle it would read Sapphire and Ruby, you need to hold the Tester at a straight angle to get an accurate reading, held straight tested for only Diamond. I just wish this one Included an option for testing moissanite! ## Frequently Bought Together - Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones - Professional Gold, Silver, Platinum Jewelry Testing Kit with Stone Instructions and Box with 30X Eye Loupe Magnifier Precious Metals 10K 14K 18K 24K 999 925 Scrap - Presidium Replacement Probe Pen PS2-2 for Presidium Gem Tester II (PGT II) and Duo Tester II (PDT II) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/40181311-instruments-gem-indicator-pgi-handheld-tester-for-identifying-diamonds-common](https://www.desertcart.pl/products/40181311-instruments-gem-indicator-pgi-handheld-tester-for-identifying-diamonds-common) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-22*