The Gaumukhi Shankh is found in Kailash Mansarovar, some Himalayan Mountainous regions and the coasts of Sri Lanka and the Andaman and Nicobar Islands and the Lakshadweep Islands. It is said that due to its shape, it is very difficult to blow this conch and blowing it is possible for only those persons having strong and powerful lungs.
Coming back to the Gaumukhi Shankh Mantra Vidhi, it can be performed on any day in the morning after having a bath and wearing clean and unsoiled white colored clothes. The Gaumukhi Shankh should be kept on a cleaned and washed flower of the Madar Tree [Crown Flower tree in English- botanical name Calotropis gigantea].
Then the Sadhaka should chant the Mantra given below 108 times using a Rudraksha Japa Mala to count the number of Mantra Chants.
ॐ नमः कामधेनु गोमुखी शांखाय मम सर्व कार्य सिध्दि कुरु कुरु स्वाहा ||
Om Namah Kaamdhenu Gomukhi Shankhaya Man Sarva Karya Siddhi Kuru Kuru Swaha ||
After this, the Gaumukhi Shankh can be kept in the Puja Place or in any clean place in the home or office.
Filling clean drinking water in the Gaumukhi Shankh and then drinking it after a few hours is considered good for health and it said give him relief from many diseases and ailments.