Diamond & Moissanite Testers

Moissanite Tester II (PMT II)

Handheld tester that instantly distinguishes moissanites (a diamond simulant) from genuine diamonds, based on electrical properties.

The Presidium Moissanite Tester II (PMT II) measures the electrical conductivity of the gemstones directly, determining if the gemstone is a genuine diamond or a moissanite (a diamond simulant).

Presidium recommends the use of the Presidium Moissanite Tester II after a positive test result for diamond is indicated on a thermal conductivity diamond tester (such as the Presidium Diamond Mate Tester).


  • Highly sensitive probe made of special grade polymer
  • Clear and easy-to-read LED display
  • Powered by 3 x AAA batteries
  • Low power consumption
  • Low battery indicator


  • Specially designed to identify moissanites
  • Tests moissanites as small as 0.05ct
  • Consistent and reliable results every time
  • No waiting time between tests
  • Clear and visible display for ease of reading
  • Simple and easy to use
  • Light and portable for convenience
  • Comes with protective carrying case


Power & Battery

3 x AAA alkaline batteries (approximately 7 hours of continuous use)

Recommended Operating Conditions

Optimal Operating Temperature: 18°C – 27°C (65°F – 80°F)

Storage Temperature: 10°C – 51°C (50°F – 124°F)

Dimensions & Weight

Length: 160mm (6.30 inches)

Width: 21mm (0.83 inches)

Height: 30mm (1.18 inches)


Weight (without batteries): 50 grams (1.76 oz)

How It Works Video