3.13ct Octagon Cut Sapphire 9x7.4mm Bergeon 6173R Reduction Ring 25cm long overall

25cm long overall

No risk of injury

Head Ø30mm

7 and above

Model Number: Dial Test Indicator

3.13ct Octagon Cut Sapphire 9x7.4mm Bergeon 6173R Reduction Ring 25cm long overallSapphire 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