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fingerprints
Applications: Wood Drilling
5) Eyeglass
60X-12mm lens is applicable to viewing printing grids
0.70ct Round Faceted Mauve Sapphire 5.2mm Casting Flask Ø90 x 65mm fingerprintsSapphire 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:
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