Kala Namak

Kala Namak (Bengali Biit lobon (বিট লবণ); Newari Be Chi; Nepali Birae Nun (बिरे नुन) ; Hindi काला नमक ; Urdu کالا نمک kālā namak; Gujarati સંચળ Sanchal; Tamil இந்துப்பு), also known as sulemani namak, black salt, kala loon or black Indian salt, is a salty and pungent-smelling condiment used in South Asia. The condiment is composed largely of sodium chloride with several impurities lending the salt its colour and smell. The smell is mainly due to its sulfur content. Due to the presence of Greigite (Fe₃S₄, Iron(II,III) sulfide) in the mineral, it forms brownish pink to dark violet translucent crystals when whole, and, when ground into a powder, it is light purple to pink in color.