2.78ct Baguette Cut White Sapphire 9x6.2mm Clock Pendulum Electronic Sensor for Elma & Witschi 7 different notches

7 different notches

Stone Details: Lapis Lazuli

Variable karat gold options may be used to calibrate this instrument

Supplied in elegant wooden storage and presentation case

2.78ct Baguette Cut White Sapphire 9x6.2mm Clock Pendulum Electronic Sensor for Elma & Witschi 7 different notchesSapphire 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: