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A remarkably designed gemstone tester with a colour estimator display for smoothly and seamlessly testing your precious stones and diamonds
Supplied in professional packaging
60mm (OD 8mm) HSS
Data hold function
2.17ct Cushion Cut Purple Sapphire Certified Unheated 9.4x5.5mm Elma Watch winders A remarkably designed gemstone testerSapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in colours is due to trace amounts of elements such as iron, titanium, chromium, copper and magnesium. Mohs Scale of Hardness: 9 (out of 10). Sources: Mines that have yielded the finest sapphires in colour and clarity are located in Kashmir, Myanmar and Sri Lanka. Nowadays the main sources of sapphires are: