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4kg Melting Furnace
Blades Ø0
Our gold testing stone is an essential tool for jewellers and retailers who demand accurate results without risking damage to precious pieces
Specially designed ring that fit onto the crystal lift
2.51ct Oval Faceted Sapphire 9.4x7.6mm Bergeon 4668 Ceramic Heating Crucible 4kg Melting FurnaceSapphire 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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