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This is a traditional economical watchmaker's sharpening stone on a wooden base
Input Current: 20A
Bergeon 4847
Maximum sheet thickness 3mm
record all parameters and status after power-up
4.67ct Oval Cabochon Star Sapphire 8.5x6.8mm Bergeon 16200 Bushing Tool Complete Set This is a traditional economicalSapphire 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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