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Bergeon 7990
easy to carry with
The housing has a ribbed rubber casing that protects it from scratches while giving extra friction to make it slip resistant
S9018(NPN Type): 40pcs
Perfect for saving space and smaller work
0.84ct Pear Shape Sapphire 6.9x5.3mm Wax Designing Ring Mandrel Kit Bergeon 7990Sapphire 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: