JEM-III Handheld MOISSANITE TESTER Mounted Jewelry Loose Stone Tool Selector UV Lights


Model: JEM-III


It is a sure way to tell the difference between diamonds and moissanite (man made diamonds). This tester will leave you in no doubt as to the nature of your stones. It isa "touch and tell you" device that utilizes the moissanite feature, the different electrical conductivity from diamond. It is effectively and quickly distinguishes moissanite from diamond. With the addition of the Ultraviolet (UV) light you can now test the flourescent reaction of stones.



  • Equipped with ultraviolet light to test fluorescent reaction of stones
  • Doesn't need to be calibrated
  • An option to use or connect with A/C adaptor (not included) for long time indoor use
  • Most compact design and low battery consumption
  • Provide visual indicator & emit audible sounds to give warning buzzer if the stone is a moissanite
  • Audible and visual indicator if the probe touches metal surface
  • With a single press of a button it can accurately and precisely:
    • Quickly distinguishes authentic diamond from Moissanite and;
    • Distinguish stones as small as 2pts
  • Supplied with vinyl pouch, testing platform for loose stones and a comprehensive instruction manual best utilize JEM-III
  • Brand new and unused



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



Set includes:

  • 1 x Moissanite Tester / Selector
  • 1 x Vinyl Leather Pouch Case
  • Heavy duty Testing Platform