Blue Sapphire (Neelam) blue sapphire is a very precious gemstone; The other names of this stone are Neelam Ratan and नीलमणि in Hindi. In its chemical analysis, it is a compound of aluminum, oxygen, and cobalt. Blue sapphire (नीलम) represents the planet Saturn (शनि ग्रह).https://rashiratanjaipur.net/gemstones/blue-sapphire