Blue sapphire Gem, aka Neelam Ratna, is considered a highly auspicious stone in western as well as Vedic astrology. While western astrology assigns it as the birthstone of September month and is best recommended for individuals born in the month of September; as per Indian astrology, it belongs to the planet Saturn or Shani and is worn to gain health, wealth, and professional prosperity. This beautiful blue crystal belongs to the Corundum gem mineral clan and holds a hardness of 9 on the Mohs scale. Buy certified blue sapphire gemstones from Navratan, the online gem Bazar.!