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25 * M3*10+6mm
PLAT" (Platinum) Inside Ring Punch
Portable 3 in 1 Loupe
crisp and clear photo’s in only seconds
Includes 2 x 75mm flanges to allow double dust collection
1.08ct Oval Faceted Sapphire 6.9x5.1mm Sand Casting Flask 25 * M3*10+6mmSapphire 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: