Hlw Alok, thank you for contacting CAREERS 360,As you are pursuing your graduation from physics major, I would suggest you to go for masters in pure physics, because if you have not studied geology in your graduation it would be a bit different for you to understand it and as you have base in physics so it would be better for you.

Here are some of the best colleges in India where you can apply for masters in pure physics...
.Presidency college, Kolkata
.St Stephen's college, New Delhi
.St Xavier's College,  Kolkata
. Christ University, Bangalore
. Fregusson college, Pune
.St Xavier's College, Mumbai

Good luck.