Lucky Gems have always been at the center of debates in Astrology. Clear your doubts by watching this video about the basic principles of astrological (planetary) gemstones. Refer Navratna: Panna, Emerald, Yellow Sapphire, Pukhraj, Blue Sapphire, Neelam, Moti, Pearl, Heera, Diamond, Manik, Ruby, Moonga, Red Coral, Lahsunia, Cat's Eye, Gomed, Hessonite, Garnet.