Presidium Gem Tester II PGT-II 16-Gem ATC Diamond Tester Open Box

New without tags. This open-box Presidium Gem Tester II (model PGT-II) is in like-new condition with original packaging and shows no signs of use. All components are present and the unit is ready to put to work the moment it arrives.

Overview

The Presidium Gem Tester II is the industry's most trusted thermal conductivity gemstone identifier, redesigned to be more compact, sturdy, and portable than its predecessor. It differentiates up to 16 types of gemstones — including diamonds and moissanites — using a clear, easy-to-read analog dial that delivers consistent, reliable results every time. The instrument features Assisted Thermal Calibration (ATC), so you can quickly self-calibrate to your specific testing environment before each session, eliminating the guesswork that plagued older thermal testers. Presidium's signature retractable probe tip is the thinnest in the industry, allowing precise contact on even the smallest stones without risk of damage.

Whether you are a working jeweler, an estate buyer, a pawnbroker, or a serious collector, the PGT-II gives you laboratory-grade stone identification in a handheld form factor. The analog dial displays gemstone zones ranging from lower-conductivity stones such as garnet and citrine through emerald, aquamarine, ruby, sapphire, topaz, spinel, and all the way to the diamond/moissanite zone — letting you make confident buying and selling decisions at the bench or in the field.

What's Included

• Presidium Gem Tester II (PGT-II) main unit
• Retractable thermal probe with cable
• Replacement probe tip
• AC power adapter
• Original packaging

Key Specs

• Model: PGT-II
• Gemstone types identified: 16
• Calibration system: Assisted Thermal Calibration (ATC)
• Probe tip: Industry's thinnest retractable tip
• Display: Analog dial
• Identifies: Diamonds, moissanites, and common colored gemstones
• Category: Diamond & Gemstone Testers
• Brand: Presidium Instruments

Note: Per the manufacturer, calibration may be affected during shipping. Use the included ATC function to recalibrate upon receipt before first use.