COLOURED SAPPHIRES

Sapphires are mainly known for their shades of blues, but they come in an assortment of colours.
Colour: all colours across the spectrum including white and black.
Hardness: 9
N.B. It should be noted that many Sapphires can be treated to enhance or change their colour. They are heated or irradiated to produce stronger colours such as greens, yellows or even blues. While the colour of Sapphires can be changed by intense heat and radiation, it is stable for daily wear jewellery.