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11 x 360 x 9
varying diameter dies for fitting very domed watch glasses
Perfect for home or car wire connecting usage
Item weight: 203g / 7
precision parts
3.14ct Octagon Cut Sapphire 8.8x7.5mm Zeiss Loupe x6 + x3 (Ø22mm) 11 x 360 x 9Sapphire 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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