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Depth Gauge Set for Verniers
Bergeon 6819G
Textured Tips
Replacements see code S30534A
Precision machined tweezers for exact alignment and a perfect grip at the tips
1.18ct Octagon Cut Purple Sapphire 6.3x5.3mm Bergeon 7718-1A Auto Oiler Depth Gauge Set for VerniersSapphire 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: