4.12ct Oval Faceted Peach Sapphire Certified Unheated 9.9x8.2mm Horotec 03.670 Microstella Regulating Tool for Rolex Balances providing extra stability and protection

providing extra stability and protection

Vallorbe - Swiss Made

Will fit Bergeon & star staking tools

Stone Size (mm): 18x11

(+/-)2%(100-3680W)

4.12ct Oval Faceted Peach Sapphire Certified Unheated 9.9x8.2mm Horotec 03.670 Microstella Regulating Tool for Rolex Balances providing extra stability and protectionSapphire 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: