It has loud sound making Big Size Blowing Shankh for Pooja. The blowing conch shell shankh that open towards left hand are left hand shankh (Vamavarti Shankh). These are the most commonly available shankh and used for all religious purposes. The special geometry of this kind of large size natural shankh creates a positive energy field. Importance of Sounding Conch. Protect from evil spirits. The blowing of the conch increases respiratory capacity. A shankh shell is often referred to in the India as a blowing conch shell or bajnewala shankh. The Vamavarti blowing shankh trumpet is sounded during worship at specific times, accompanied by ceremonial bells and singing.