Rock salt is another name forthemineralhalite which is commonly knownassodiumchlorideand has a chemical formula NaCl. It is commonly known as table salt or ‘Sendha namak’ or‘kala namak‘ in Hindi, ‘RatiUppu‘inTelugu,‘Intuppu‘ in Tamil, ‘Kallu Uppu‘ inMalayalam,‘Kalluppu‘ inKannada,‘ShendeLon‘inMarathi,‘Sindhalun‘ in Gujarati and SaindhavaLavan‘inBengali. It is mostly colorless or whitethough its color may vary from light blue, dark blue, purple topink, red, orange, yellow or grey depending uponthe amount and type of impurities present in it.
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