Presidium Gem Tester

Streamline your gemstone identification process with the industry's most trusted thermal tester. In its advanced second generation, the Presidium Gem Tester II (PGT II) provides a fast, reliable way to identify diamonds and moissanites, while also separating up to 16 common colored gemstones based on their unique thermal conductivity. Featuring a clear, direct analog dial and a newly redesigned built-in calibration system, this portable desktop unit guarantees consistent accuracy whether you are testing in a climate-controlled laboratory or out in the field.

Key Features & Benefits

• Industry's Thinnest Probe (0.6mm): The retractable thermoelectric probe tip ensures constant, perfect pressure against the stone. At just 0.6mm, it easily tests polished or unpolished gemstones as small as 0.02 carats.

• Broad Identification Range: Instantly differentiates diamonds and moissanites, and accurately separates 16 common colored gemstones on a clear, easy-to-read analog dial.

• Built-in Calibration Reference: Features integrated Glass and Calibration (CAL) test discs, allowing you to easily adjust and calibrate the machine on the fly for both indoor and outdoor operating environments.

• Metal Alert Buzzer: Emits a clear audible warning to ensure the probe tip is in contact with the gemstone and not the metal jewelry setting, preventing false readings.

• Instant, Continuous Testing: Delivers consistent and reliable results every time with absolutely no waiting or recovery time required between tests.