Awadh-Whole Natural Black Salt Crystals | Kala Namak Whole | Black Salt Chunks | Kala Loon Chunks..Kala Namak (also known as Himalayan Black Salt or Indian Black Salt in English) is a type of Rock Salt which is generally dark reddish black in color and has pungent smell and sulfurous odor. The powder of Kala Namak has pinkish gray or light purple color. Kala namak or Black salt is extensively used in Ayurvedic medicine. It is also used as a condiment in Indian cooking and is added to chaat chutneys sprinkled on fruits and other Indian snacks before eating. It tastes great on cut vegetables too.