As per Gautamiya Tantra, near the kali - Gandaki river, there is a big place called Shalagram.The stones which appear in that place are called shalagram shila.
The Laxmi Shankh brings immense prosperity and growth. With this the sick businesses turn around and become very profitable.
In any spiritual and Vedic ceremony, worship of Shankh is necessary.
The Shanka used in Vedic poojas is of the species Turbinella Pyrum dextral.