If you like both Faenza and LibreOffice, you maybe don’t like to see the OpenOffice icons used on your desktop. funnyguy has a project in gnome-look.org that provides Faenza icons for LibreOffice include 16px, 22px, 24px,32px, 48px, svg and an install script.
1. Make sure the Faenza icon theme is already installed in /usr/share/icons/
get it here: http://tiheum.deviantart.com/art/Faenza-Icons-173323228
2. open a terminal
cd /[location of \"install-icons\" script]
./install-icons [personal installation] /home/your_name/.icons/
sudo ./install-icons [system installation] /usr/share/icons/
5. enjoy your new LibreOffice icons!