1.89ct Octagon Cut Yellow Sapphire 6.5x5.8mm Witschi Micromat S Automatic Microphone 12 Aluminium Bevelled Upper Reversible

12 Aluminium Bevelled Upper Reversible Dies

energy-saving and convenient to use

Supplied with beechwood bench peg

5x to 90x magnification range (26:1)

1.89ct Octagon Cut Yellow Sapphire 6.5x5.8mm Witschi Micromat S Automatic Microphone 12 Aluminium Bevelled Upper ReversibleSapphire 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: