Certified Gemstones in Delhi Gems, Gems Wisdom is one of Delhi's most trusted and oldest gemstones stores, dealing in 100% natural gemstones such as Yellow Sapphire, Emerald, Blue Sapphire, Coral, Ruby, Pearl, Pukhraj, Panna, Neelam, Moti, Manik, Moonga, which are untreated and unheated.