Naga Mani is mentioned in the Garuda Purana as the Cobra Hood Jewel.

Benefits of all Nagmani, Naagmani, Snake Pearls

Improves the quality of the aura, attracts luck, improves business and social life, charisma, personal magnetism, healing, regeneration, magical energies.

The Snake Totem

Also called cobra pearl and nagamanikyam, the snake dwells in so many places, climates and environments, comes in so many colours, shapes and sizes that this creature can be said to be one of the most versatile of all. Indeed, snakes represent versatility, transmutation and change, their natural inclination to “shed their skins” leaving behind the old, and adapting to the new, supports this idea. The snake has been, throughout the ages, controversial in many regards. Some see the snake as a bearer of evil or bad news, but most see the snake as the healer and spiritual icon that it is. The debate among Christians has always been whether the snake is the personification of evil or a holy and scared icon.  There are many references to the snake in the bible, some portraying this creature as a bearer of evil, but most refer to its job as healer and spiritual muse. Nowhere in the bible does it say that snakes are evil, however, like any creature, human or animal, they possess both noble and questionable qualities. Some people fear them and many more are charmed by them. But nagmani, vasuki snake stone always gives positivity, healing and ultimate power to the possesser.