Item Description: Tabletop Gem Polariscope COMPARE TO JEWELRY TV AND GIA! Product Specs: Input: 110Volt-220Volt 50Hz Environment Temperature Range: 10'C-35'C (50'F-95'F) Weight: 750 Grams Dimensions: 120mm x 79mm x 115mm Sturdy, Portable Design made of an enameled sheet steel, not plastic like some other units in the marketplace! Perfect for the GIA Student, Hobbyist AND Professional! This item is an exceptional Value! The Tabletop Polariscope is an instrument used to detect optical properties of Gemstones. This unit is used to quickly and easily determine whether a stone is single or double refracting, the presence of strain in diamonds and other gems, and it is being used increasingly today because of its value in seperating synthetic amethyst from genuine. This is on ONLY instrument available that can make that distinction!Included are:* Conoscope & Holder* Powercord* Users GuideHigh Quality!TheTabletop Polariscopecomes with a 1 year warranty against any defects, so you can buy with total confidence. This unit is made ofenameledsheet steeland has a smooth finish. It is not made of plastic likesome units out there!For LARGER ORDERS, please check out our eCRATER Store!