Praval Pishti (Coral Calcium) Reference: Ayurveda Sara Sangraha, Shodhana marana prakarana page: 119, AFI Vol. 1. Praval Pishti is an Ayurvedic medicine which is prepared from Coral. Praval is the name given to coral in Hindi and in Ayurveda. However, coral calcium powder is not used directly in Ayurveda. Coral calcium powder is processed with edible rose water and ground to make a micro-fine powder. The coral calcium powder processed with rose water is known as Praval Pishti. It is