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💎 Don’t just test gems—own the confidence to authenticate like a pro!
The Presidium Instruments Gem Tester II (PGT II) is a compact, battery-powered thermal conductivity tester featuring Assisted Thermal Calibration (ATC) for precise identification of diamonds, moissanites, and 16 other common gemstones. With the industry’s thinnest retractable probe tip and an easy-to-read analog dial, it delivers consistent, reliable results trusted by professionals worldwide.






| ASIN | B08M87J44P |
| Best Sellers Rank | #260,077 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #80 in Jewelry Diamond Testers |
| Brand Name | Presidium |
| Color | Black |
| Customer Reviews | 4.1 4.1 out of 5 stars (418) |
| Item Dimensions | 4.5 x 3.8 x 7.8 inches |
| Item Weight | 0.54 Kilograms |
| Manufacturer | Presidium Instruments |
| Measurement Type | Thermal Conductivity |
| Model | PGT-II |
| Part Number | PGTII |
| Power Source | Battery Powered |
| Specification Met | Yes |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 27 Degrees Celsius |
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