West Bengal Mineral Development And Trading Corporation Limited
13,Nellie Sengupta Sarani ( Lindsay Street) 2nd Floor
Kolkata- 700087, West Bengal (India)
Lohia Metals
No. 16, Ramsevak Mullick Lane, Pittal Patti
Kolkata- 700007, West Bengal (India)
Balmukund Diamond TMT Bar
No. 4, Chaerangee Lane, No. 7, Diamond, Chamber, Block- 1
Kolkata- 700026, West Bengal (India)