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Durston 1601
Contents: 250ml
5 Half Round Grooves
Can hold up to Ø10mm wire/tubing
22mm (18swg) Weight including dispenser 30g
2.52ct Octagon Cut Deep Purple Sapphire 8.1x5.6mm Ø75 x 100mm Casting Flask Durston 1601Sapphire 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
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