0 .6ct Natural Royle blue Sapphire untreated unheated Investment stone

Blue sapphire colors range from pale blue to cornflower blue to royal blue, navy blue and midnight blue.  The main sources are Sri Lanka (Ceylon), Burma (Myanmar), Madagascar, Tanzania, Australia and Thailand. At one time exceptional sapphires came from Kashmir, but no new material has been found there for about 100 years.

The prices and value of blue sapphire vary depending on the size and quality of the gemstone.  Color is the most important determinant, with saturated hues that are neither too light nor too dark being the most valuable. Blue sapphires tend to have better clarity than rubies, so eye clean gems are most desirable. Gems over 2 carats are rare and prices tend to increase exponentially with carat weight. Any high quality blue sapphire over 5 carats would be regarded as very rare and collectible