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Ships within 48 hours · Estimated delivery Oct 29 - Nov 3
Response Time and Wave Length: less than 500ms 8-14μm
This product adopts high-tech
5cm / 2 * 2 * 1in
polishing powders
Aplanatic and achromatic lens
5.96ct Octagon Cut Bi-Colour Green Sapphire Certified Unheated 13.1x8mm Seiko Beep Alarm 6.2mm (NEF) Shaft Movement Response Time and Wave Length:Sapphire 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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