Customizing the icons of any module via css

I was wondering if anyone knows the cheat sheet to all the icons available to me through the css.

I see that the opportunities refrences a code f1ae :

Can anyone please advise me how i can change the icons? Can this be done in studio? I dont mind coding the css if i know what the code is for the different icons.

Im currently running :

Suite Version 7.11.1
Sugar Version 6.5.25 (Build 344)

on php 7.something

I don’t know much about this, but about a year ago these were put into a Font, see here:

In those files you will find some lists of available characters with their names, I don’t know if this is enough for you?