Blue Sapphire also known as Neelam is the gemstone representing Planet Saturn. This is a Precious stone. It is the gemstone of the Zodiacs Capricorn and Aquarius. The substones of this stone are Amethist, Black Star,Lapis and Black Agate. The beautiful 'Blue Sapphire', is regarded as the 'Stone of the Stones' and is considered to give peace of mind, tranquility, happiness and spiritual enlightenment.