4.12ct Oval Faceted Peach Sapphire Certified Unheated 9.9x8.2mm Horotec 03.670 Microstella Regulating Tool for Rolex Balances or it may not start

or it may not start

amplitude and beat error and display them in real-time

Stone Size (mm): 18x11

Vallorbe - Swiss Made

4.12ct Oval Faceted Peach Sapphire Certified Unheated 9.9x8.2mm Horotec 03.670 Microstella Regulating Tool for Rolex Balances or it may not startSapphire 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: