A Remarkable designed Gemstone Tester with color estimator display for smoothly and seamlessly testing your Precious stone and diamond.

The SmartPro Gem-Eye I it was developed to distinguish between diamond and its other simulants using the principles of thermal conductivity. Diamonds, with their exceptional heat conductivity properties are unlike any other simulant, and are therefore not easily replicable.

The SmartPro Gem-Eye I is now equipped with a color stone estimator display to assist the user in distinguishing popular colored gemstones form each other.

The SmartPro Gem-Eye I consists of two linked thermometers: one, which is heated electronically, while the other is cooled by the gemstone being tested. The difference in temperature creates an electrical output, which is then amplified and displayed on an analog dial.

Download User Manual / Download Calibration Step


  • High efficiency gem tester
  • Retractable thermoelectric probe tip that ensures constant pressure between probe tip and gemstone
  • Industry’s thinnest probe tip (0.48mm) for testing diamonds as small as 0.01ct
  • LEDs indicator
  • Metal alert LEDs with buzzer sound to ensure that probe tip is in contact with gemstone during testing
  • Easy-to-read analog panel display
  • No waiting time between tests
  • Built-in diamond and simulant test discs for reference

Dimensions and Weight

  • Length: 78.75 mm
  • Width: 99.73 mm
  • Height: 130.10 mm
  • Weight: 295 g

Operating Conditions

  • Operating temperature: 18°C- 27°C (65°F- 80°F)
  • Storage temperature: 10°C- 50°C (50°F-122°F)


  • Identifies metals, simulants and diamonds instantly
  • Simple and easy to use
  • Enhanced accuracy and consistency
  • Accurate testing on diamonds as small as 1.0mm (0.01ct)
  • Enhanced functionality and usability
  • Clear and readable analog panel display for ease of reading measurements
  • Portable tester that can be used anywhere

Power and Battery

  • 3 x AAA batteries (approximately 2.5 hours of continuous operation)
  • SmartPro Power Adaptor (optional item provided by SmartPro)

Technical Specifications

  • Weight: 295g
  • Power: 3 x AAA batteries or AC adaptor (optional item provided by SmartPro)
  • Battery Life: Up to 2.5 hours of continuous use based on alkaline batteries
  • Standby Time: 2 min from the last measurement
  • Operating temperature: 18°C-27°C (65°F-80°F)
  • Storage temperature: 10°C- 50°C (50°F-122°F)

Include in package

  • SmartPro Gem-Eye I
  • Probe pen
  • AC adapter
  • User manual book
  • Warranty card
  • Protective carry case
  • Probe tip oxidation sheet