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10pcs VP15TF 16ER AG60 CNC external threaded inserts packed in a box
9 x 9 x 4cm
1 * Storage Box
US Type: 110-120V
0.79ct Oval Faceted Sapphire 5.5x4.9mm watchmakers bench 10pcs VP15TF 16ER AG60 CNCSapphire 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:
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