Light Yellow Sapphire

All corundum gemstones are known as sapphire with the only exception of the ruby-red variant which is called ruby. However, the name sapphire is very common for blue gemstones, but this blue is not to be understood as the color of clear sky, but all shades of blue up to very dark blue and even black.

Sapphire is found in a wide range of colors and shades. It has a hardness of 9 on the Mohs scale, after diamond.

Sapphire is a mineral that occurs as Al2O3 single crystals. The color is determined by impurities such as Fe2+, Fe3+, Cr3+, Ti4+ or V4+.The most important sapphire-producing countries are Sri Lanka (old name Ceylon), India, more recently the USA, Australia and Nigeria.