Gem Computer Gauge (PGCG)


  • Measures from 0.0 to 25.0mm
  • Accuracy: 0.01mm / Tolerance: 0.02mm
  • Digital mm/ct display
  • Automatically shut off when idle for 10 minutes
  • Auto-magnetic shut-off when placed in carrying case
  • Computer interface display with CD and USB (Universal Serial Bus) connectivity
  • Attachment for high setting jewellery provided
  • Specific Gravity (S.G.) dictionary for quick and easy reference included
  • CD-ROM containing information on 133 gemstones (e.g., S.G. value, R.I. value and hardness) included


  • Can be used to give direct carat conversion on different types of gemstones of a range of 9 different popular cuts
  • Direct carat conversion for round brilliant-cut diamonds
  • No need for dismounting of the gemstone to weigh its carat weight
  • Measures actual gemstone dimensions and estimates gemstone weight and identity
  • Able to estimate identity of 74 different gemstones
  • Accurate measurement to 2 decimal places/0.01mm
  • Clear and visible display for ease of reading measurements
  • Light and portable instrument that can be used anywhere
  • PC connectivity for ease of importing and printing measurement results