1) Can aqeeq, firoza, durre najaf be worn all at the same time?
2) What is the difference between stones and their effects?

by

1- Yes they can all be worn at the same time.

2- They do have different effects. Aqeeq makes our Du’as to be more likely answered. The Firozah makes it more likely to have children for those who cannot have. Seeing the Durre Najaf stone is an act of Ibadah