Tiheum, who is best known for the Faenza icon theme and Equinox GTK themes has started working on a new icon theme for GNOME 3 / GNOME Shell called "Faience". The theme is work in progress (this is the first public release) and it currently depends on the original Faenza for many icons, but it looks really promising and it already comes with 3 folder color variations.
Faience icon theme is especially designed for GNOME Shell so it's not recommended to use it with Unity / GNOME 2.
Tiheum is also working on a GNOME Shell and GTK2/3 theme which will complete the "Faience" pack. The GTK2/3 theme is not yet available but you can already use the Faience GNOME Shell theme:
(Faience GNOME Shell theme and the original Faience folder icons)
Faience icon theme
To add the PPA and install the new Faience icon theme in Ubuntu, use the commands below:
sudo add-apt-repository ppa:tiheum/equinox sudo apt-get update sudo apt-get install faience-icon-theme
Alternatively, download download the archive (note: you'll also need the Faenza icon theme) and copy all the 3 folders (Faience, Faience-Azur and Faience-Ocre) to the ~/.icons directory (if this folder doesn't exist, create it), then use GNOME Tweak Tool to apply the icon theme:
Faience GNOME Shell theme
To use the Faeience GNOME Shell theme, download it from HERE, extract it to the ~/.themes folder and use GNOME Tweak Tool to apply it. If for whatever reason you don't want to use GNOME Tweak Tool (like... you can't install the user-theme extension which is required by this feature), just remove all the files under /usr/share/gnome-shell/theme and copy the Faience GNOME Shell theme files to this folder.
Download: Faience icon theme | Faience GNOME Shell theme