Origin: India
These shells are used with the 3rd eye chakra and higher consciousness.  Associated with wealth, propsperity, health, & success, they are sacred to Hindus and Buddhists.  Use to aid in finding inspiration and direction through meditation, or keep in your wallet (in even numbers) to aid in bringing about prosperity and wealth.  
 
Listing is for 1 shell to be intuitively chosen by me.