How to set icon for tex files?

How to set icon for tex files? References In Ubuntu 12.04 with all mate, cinamon, gnome, unity desktops, the following issue: I use Latex frequently. My files end with extension .tex. The mime.types associated with tex is text/x-tex. The entry in /etc/mime.types for this is as follows: text/x-tex tex ltx sty cls Thus the icon associated with tex files is the generic icon for all files of text category. I would like to have a special icon for all tex files only. It will make the things easier in finding from a folder which are tex files. How do I achieve it? I have tried editing /etc/mime.types changing the above line to text/x-tex ltx sty cls and then entering another line: application/tex tex and then putting a special icon file application-tex.svg in /usr/share/icons/gnome/scalable/mimetype and then updating the icon cache (logging out and in again). But that did not show the icon for tex files. Help will be appreciated!