Dakshinavarti shankha

Dakshinavarti shankha (Sanskrit: दक्षिणावर्ती शंख, romanized: Dakṣiṇāvarta śaṅkha), also referred to as Valampuric caṅku (Tamil: வலம்புரிச் சங்கு) and Sri Lakshmi shankha (Sanskrit: श्रीलक्ष्मी शंख, romanized: Śrīlakṣmī śaṅkha) is a sacred Hindu conch. It refers to the shell of a large sea snail from the Indian Ocean (a shell of the species Turbinella pyrum), but one that has a rare reverse-turning spiral.

The shankha is held with the spout (siphonal canal) pointed up; its spiral twists rightwards rather than the more common form, which twists leftwards.