Computerised gemstone gauge (presid PGCG) Resolution_0.1g Replaceable pen probe lasts for

Replaceable pen probe lasts for 5000 tests with proper care

Combine 6X with 7X to give13X

Refractive index chart (pdf download) - for 75 common gemstones

And the outer packaging is battered

simply tell us (there is no need to fill it in again)

Computerised gemstone gauge (presid PGCG) Resolution_0.1g Replaceable pen probe lasts forSummary AS A GEM GAUGE You might think to yourself: rather than measure a stone, look up charts and formulae, then use a calculator to work out the weight can't this all be done automatically, with a computer built into the gauge?? The answer is yes. Select the stone on the display, measure it, the weight will be displayed. This is the top model of gauge from the best manufacturers of electronic gem testing equipment. AS A GEM TESTER Weigh the stone