1.39ct Octagon Cut Bi-Colour Sapphire 7.3x5.6mm engravers wax The variety in colours is

The variety in colours is due to trace amounts of elements such as iron

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1.39ct Octagon Cut Bi-Colour Sapphire 7.3x5.6mm engravers wax The variety in colours isSapphire 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