4.57ct Blue-Green Colour Octagon Cut Sapphire Certified Unheated 9.9x7.8mm Vallorbe Swiss Set Used for: All 125mm High-speed

Used for: All 125mm High-speed Electric Grinder & Pneumatic Tools

Sits in a bench vice

Calibration can be required if the device is transported or moved from table to table

A 3MP USB digital camera captures still images and streams live videos on your computer

Maximum capacity 36mm diameter

4.57ct Blue-Green Colour Octagon Cut Sapphire Certified Unheated 9.9x7.8mm Vallorbe Swiss Set Used for: All 125mm High-speedThis unheated sapphire is accompanied by a certificate from GIA. Sapphire 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