Thank you for the query.
You can not expect that every person will have same symptoms with same issue. Every one is different and can have different reaction to same condition. Also every stone in the gallbladder
is different and can appear in different way.
But what is certain, you need a surgery. The stone is large, but it wont cause any problem with gallbladder removing. Usually it is done with laparoscopy
I suggest you to consult a surgeon and get scheduled for a surgery.
Hope this will help.