8.43ct Oval Faceted Sapphire 13x11mm Crucible Excellent when using abrasive wheels

Excellent when using abrasive wheels

Continuous diagram recording

Quartz watch oil (2ml)

Semi Flush

57 x 57 x 17mm

8.43ct Oval Faceted Sapphire 13x11mm Crucible Excellent when using abrasive wheelsSapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, green, brown, purple, pink, black and colourless. Red and reddish pink coloured corundum is referred to as ruby. 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