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Left Hand Thread
so it won't slide around on your desk and the small parts will stay firmly as well
With carrying black pouch
1 * Digital Vernier Caliper
With handle for easy lifting
0.55ct Cushion Cut Bi-Colour Sapphire 5x4.2mm Bergeon 6825 Spring Bar Tool Left Hand ThreadSapphire 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: