The blue sapphire was declared the national Gemstone of Sri Lanka in October 2003. A postage stamp worth LKR 4.50 was issued on 2 October 2003 to mark the announcement. Sri Lanka is famous for blue sapphires, especially known for their size.
The blue sapphire belongs to the Corundum family. While pure Corundum is colourless, the red variety is called ‘Ruby’. Blue Corundum is called Blue Sapphire. ‘Pathmaraga’ is another variety. There are others identified by the different colors like Yellow Sapphire, Pink Sapphire, Green Sapphire and so on. Sri Lanka is world famous for Blue Sapphires with most of the largest sapphires in museum collections from around the world being from here. They are widespread and occur mostly among the secondary sedimentary deposits as water worn pebbles.