Faience is the name of the newest "creation" of Faenza's Tiheum, an icon theme created with GNOME-Shell in mind (at least at the moment) but works in Unity, too (in this stage of development, in Faience there is a limited support for the Unity panel, so, you will loose some of the monochrome icons).
Faience 0.1 is a work-in-progress and depends on Faenza (it is basically another improved version of Faenza), so, to run it, you need to install Faenza.
Faience comes in three flavors: