1.97ct Cushion Cut Sapphire 7x6.7mm Seiko Beep Alarm 6.2mm (NEF) Shaft Movement Audible continuity and Diode test

Audible continuity and Diode test

Material: Red Corundum

Ready to use

01g and the best scale for the job

Easy tool for cutting tubing or rods

1.97ct Cushion Cut Sapphire 7x6.7mm Seiko Beep Alarm 6.2mm (NEF) Shaft Movement Audible continuity and Diode testSapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, green, brown, purple, pink, black and colourless. Red and reddish pink coloured corundum is referred to as ruby. 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