Computerised gemstone gauge (presid PGCG)

Summary 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 very accurately on a weighing machine, measure it, the built-in computer will calculate it's specific gravity (SG) and give a suggestion as to what the stone might be. This is not a 'guaranteed' method of identifying gemstones, since many gemstones have similar SGs, but it's useful guide. Guarantee: 1 year Stones listed These are the stones listed, whether you use this as a measuring gauge to see the size (weight) of a stone, or whether you weigh the stone and get the computer to suggest its identity: Albite feldspar, Alexandrite, Amber, Andradite garnet, Apatite Benitoite, Beryl, Brazillianite Calcite, Chalcedony, Coral, Corundum, Cubic zirconium oxide Danburite, Diamond, Diopside, Dipotase Fluorite GGG, Glass Hematite Idocrase, Iolite Jadeite, Jet Kornerupine, Kyanite Labradorite feldspar Lapis lazuli Malachite, Microline, Moissanite, Moldavite Obsidian, Oligoclase feldspar Pearl, Peridot, Plastic, Pyrope garnet Quartz Rhodochrosite, Rhodolite garnet, Rhodonite Sapphire, Scapolite, Serpentine, Shell, Sinhalite, Sodalite, Spessartite garnet, Sphene, Spinel, Spodumene ,Strontium titanate, Synthetic emerald, Synthetic rutile, Synthetic spinel TL grossularite garnet, Turquoise Verdite Y.A.G. Zircon (high), Zircon (low), Zircon (medium), Zoisite