According to Hindu Vedas and Puraanas gems are considered to be the most precious stones possessing spiritual powers. There are totally 9 stones which are termed as “ Navaratnas” in India. These 9 stones are the representative of nine planets which has special characters and unique powers. They are Diamond, Emerald, Coral, Pearl, Yellow Sapphire, Blue Sapphire, Ruby, Hassonite and Cat’s eye. The existence of these stones in 9 different colors is due to its absorbing nature of different colored rays.