Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones
Product ID: 386129511
📏Industry's thinnest 0.45mm probe tip
🔋USB & 3xAAA power options
⏱️Results in <6 seconds
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💎 Test smarter, shine brighter—own the gem game with Presidium PGI!
The Presidium Gem Indicator (PGI) is the industry’s only handheld tester designed specifically for colored gemstones, delivering rapid and accurate identification of up to 31 gem types. Featuring the thinnest retractable 0.45mm thermoelectric probe tip, a color input function for enhanced precision, and a clear digital LED display, it combines ergonomic design with versatile power options including USB and AAA batteries. Ideal for professionals demanding quick, reliable gem testing on the go.
| ASIN | B06X979666 |
| Batteries required | No |
| Customer Reviews | 3.7 3.7 out of 5 stars (60) |
| Date First Available | 24 March 2018 |
| Item model number | PGI |
| Package Dimensions | 20.57 x 8.64 x 6.1 cm; 318 g |
S**N
identifies several precious and semiprecious gemstones together with diamonds and moissanites
Keep the operating procedure simple to follow/understand. Can you share a detailed and simple procedure to start using including how to test different colored gemstones?
H**Y
Must have for gems collectors!
Must have for gems collectors but I wish it could do more, and pretty pricy
A**O
Buen producto
Falto el instructivo y caja vino dañada tratare de bajar el manual de internet , medio difícil de utilizar
B**A
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.
A**A
A good Useful Tool to have
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!
J**N
Not what I expected for the price
I found this gem tester to be very inaccurate in that it gives you a wide range of possible stones. It also has a very difficult time with blue and green stones calling them glass most of the time. For the $300 plus price I expected it to be more accurate and informative. I have an RI tester that is so much better but is hard to use on smaller stones. That was my main reason for the purchase of the new tester with a small tip. It will press against small gems but the readings are not very accurate.
Trustpilot
1 month ago
2 days ago