Out of the various varieties of sapphires, the Blue Sapphire Gemstone is considered as one of the most valuable ones. This naturally-occurring gemstone is formed through aluminum oxide (corundum) and includes traces of other elements like cobalt, which give it a truly fascinating blue shade. Even though its blue color is liked by many, this gemstone tends to show different hues when seen from different angles.https://blog.sehdevjewellers.com/gemological-guide-blue-sapphire-gemstone/