This conch was one the fourteen divine products available when sea was churned. Lord Vishnu took this as his property and holded it in his right hand. The opening of the conch also comes to the right hand side. This shankh should always be confiscated with puja and offerings, then only it gives desired results. It is mentioned in bhramvavrat puran that once Lord shiva killed the demon "Shankhchood" with the help of vishnu's trishul. The body of the demon was thrown in sea. This is the shankh which got birth as shakh and because he was killed lord shiva and the Vishnu's trishul he is considered auspicious.