Where are the Calibre Program icons located?

I want to make a library column for my "copy columns" library (basically it has the standardized columns I want to keep for my libraries and I send empty books from it to other libraries to help standardize them) I want to make the "column" icon used in the regular Calibre setup for the library column. I can't find the icon locations. Not interested in hunting down and downloading a "column" from the internet when the icon from Calibre works fine.

EDIT:

Nevermind, found them in the program folder.