• The Presidium Gem Computer Gauge can be used with many different shapes of stones (i.e. round, oval, emerald, marquise, heart, pear, cushion, rectangular, or cabochon)
  • It works equally well with diamonds and almost all gemstones used in jewelry
  • It can give you a direct reading of carat weight for brilliant cut diamonds
  • It has a gemstone estimator which uses the specific gravity of stones to help identify them. This is another option to be used in addition to the gem testers we sell.
  • It can help you calculate the price of your gemstones