Presidium DuoTester is the only comprehensive tool on the market that combines two proven testing methods for gemstones. PDT differentiates diamonds from its simulants based on both their thermal conductivity and reflective indexes. Coated gemstones can also be generally tested with the PDT.

The Presidium DuoTester has a retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, PDT tests gemstones as small as 0.02ct.

- Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone

- Industry’s thinnest probe tip (0.6mm) for testing gemstones as small as 0.02ct

- Metal alert buzzer to ensure that probe tip is in contact with gemstone during testing

- Colored gemstone display

- Large easy-to-read analog dial and digital index LED displays

- Built-in diamond and simulant test discs for reference

- Built-in simulant refractivity chart

- Built-in simulant set for calibration of reflectivity meter (optional item provided by Presidium)

- Powered by 5 x AA batteries or AC adaptor

- Leather carrying case included