💎 Unleash Your Inner Gemologist! Identify diamonds, moissanites, and 16 other gemstones with ease. The most trusted gemstone tester in the industry, redesigned for reliability. Compact and sturdy design for on-the-go gem testing. Clear analog dial ensures effortless operation for all skill levels. Experience the industry's thinnest retractable probe tip for pinpoint accuracy. Compact design Battery powered Thin probe tip The Presidium Instruments Gem Tester II (PGT II) is a state-of-the-art gemstone testing device featuring Assisted Thermal Calibration (ATC). Compact and portable, it boasts the thinnest retractable probe tip in the industry, allowing for precise identification of diamonds, moissanites, and a variety of colored gemstones. With a user-friendly analog dial and battery-powered convenience, this tester is designed for both professionals and enthusiasts alike.