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Gemological tool

Thermal Probe

Confirms diamond, but always follow up with a moissanite tester

Typical price$ 20 - 150
PortabilityHighly portable
Field notePocket-sized, battery

How to use it

  1. Allow the probe to fully charge and warm up
  2. Touch the tip gently and briefly to a clean, flat surface of the stone
  3. Read the display: diamond shows a high thermal conductivity signal
  4. If result is positive, immediately test with a moissanite-specific tester
  5. Clean the probe tip between tests