Blue Sapphire is one of the strongest gems in the world and holds a great value in astrology. It is found in the mines of Sri Lanka and India. The largest sapphire was found in southern Sri Lanka in Ratnapura which weighed 1404.49 carats. Sapphire is associated with the month of September when it comes to birthstones. It is available in many colors like pink, green and yellow. However it is desired in its purest form being the rich blue colour. It has many meanings like helps in representing trust and loyalty and is believed to keep the close ones protected as well.