Indian Black Pottery is Nizamabad’s Art. The products made include Vases, Cups and Saucers, Water Jugs, Plates, Jars, and Flower Pots The lustrous black pottery is rubbed with oil and then fired twice. Various beautiful floral and geometric designs are then itched to it. The clay turns to a deep black color when the clay is mixed with mustard oil seed cake. The etched surface is rubbed with an amalgam of mercury and tin which gives a silvery color.