1.76ct Oval Faceted Yellow Sapphire Certified Unheated 8.3x5.7mm Bergeon 30601-127-131 Spindl Collets & Stop Ring Can take centre seconds hands

Can take centre seconds hands up to 90mm long

Bracelet Adjusting Kit

10 x 560 x 11

This product is non-waterproof，please use it carefully

1.76ct Oval Faceted Yellow Sapphire Certified Unheated 8.3x5.7mm Bergeon 30601-127-131 Spindl Collets & Stop Ring Can take centre seconds handsSapphire 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: