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Calibre 2235 Axle Punch
Suitable for circuit construction or household line checking
Worktop thickness 2cm
Graver - Valorbe Square 2
Thermocouple
2.96ct Oval Faceted Sapphire 9.36x7.6mm Kaya Cast Casting Machine Calibre 2235 Axle PunchSapphire 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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