6.01ct Oval Cabochon Star Sapphire 10.4x8.8mm Durston Superior Hardwood Jewellers Bench outside diameter and depth

outside diameter and depth

7K ohm 20 1/4W 3K ohm 20 3

Perfect to use with electric grinder

1 Set of 8 blades

6.01ct Oval Cabochon Star Sapphire 10.4x8.8mm Durston Superior Hardwood Jewellers Bench outside diameter and depthSapphire 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: