Gems have always been one of the most radiant parts of Ancient Hinduism and hold an unshakable position in Hindu values and beliefs. The now-famous term "gemology" used to be known by the name Ratna Shastra and Ratnas. The genesis of 9 Gemstones was discovered concerning their links with the 9 planets (navgrahas) around the 6th century CE. Those gemstones are ruby, pearl, coral, emerald, sapphire, diamond, topaz, zircon, and cat's eye. They are associated with the sun, moon, Mars, Mercury, Saturn, Venus, Jupiter, Rahu, and Ketu respectively. The position of these gemstones in gold highly determines the level of benefits that a wearer would be blessed with. Find below the ways that were practiced in Ancient Hinduism to ensure harmony between gems and their respective planets.