111b, 2nd Floor, Jodhpur Park,, Kolkata - 700068, West Bengal, India
101, Siddha Point, Park Street,, Kolkata - 700016, West Bengal, India
25/a & B, Nasiruddin Road,, Kolkata - 700017, West Bengal, India
(mining Division) Industry House, 18th Floor, 10, Camac Street,, Kolkata - 700017, West Bengal, India
No 72, 3rd Floor, Canning Street,, Kolkata - 700001, West Bengal, India