4.57ct Blue-Green Colour Octagon Cut Sapphire Certified Unheated 9.9x7.8mm Swiss Style Demagnetiser Square timing key for all

Square timing key for all co-axial Omega movements

Item Weight: 58g / 2

For synthetic materials sensitive to static electricity  Watch glasses

prevent corrosion and provid a waterproof seal

1 - 1000g Mini Digital Jewelry Balance Pocket Scale LCD

4.57ct Blue-Green Colour Octagon Cut Sapphire Certified Unheated 9.9x7.8mm Swiss Style Demagnetiser Square timing key for allThis 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