Sapphire is a gemstone variety of the mineral Corundum. It can naturally occur in a wide variety of colours, such as blue, yellow, purple, orange and green colours which are called ‘fancy sapphires’. It is very desirable due to its excellent colour, hardness, durability and lustre. Important sources include Sri Lanka, Burma (Myanmar), Thailand, Cambodia, Madagascar, Tanzania, Australia and The US (Montana). The Kashmir region of India / Pakistan was famous for its ‘Kashmir blue’ sapphire, but little material comes from there today.