JEM-II Diamond Tester with Ultraviolet (UV) Light

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This diamond selector remains unresponsive to materials like imitation crystals, or simulants like cubic zirconia, moissanite, and lab-grown diamonds, upon contact with the surface. It is the easiest answer for the vast majority of retail jewelers, pawn brokers, and chain stores when faced with the decision of which diamond selector to buy. Why? Because it works reliably and shares the most advanced diamond selector technology on the market.


  • Equipped with ultraviolet light to test the fluorescent reaction of stones
  • Flexible calibration with multi Level Volume to match different sizes of stones
  • An option to use or connect with an A/C adaptor (not included) for long time indoor use
  • Most compact design and low battery consumption
  • Emit audible sounds to give a warning buzzer if the probe touches a metal surface
  • The audible and visual indicators of genuine diamond
  • With a single press of a button, it can accurately and precisely: 
    • Identifies genuine "natural" diamonds
    • Distinguish stones as small as 2pt
  • Supplied with a vinyl pouch, a testing platform for loose stones, and a comprehensive instruction manual
  • Brand new and unused


  • Probe Warm-up Time: about 25sec
  • Working Time: about 5 hours for continuous use
  • Suggested Working Temperature: 18°C to 30°C
  • Working Voltage: 1 x 9V, 6F22 battery (not included the set) or AC adaptor 110V-240V, DC 9V (not included the set)
  • Size: 168 x 31 x 21mm
  • Net weight: 55g

Set includes:

  • 1 x Diamond Tester
  • 1 x Vinyl Leather Pouch Case
  • 1 x Heavy-duty Testing Platform
  • English Instruction Manual

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