@Unia, funny you should ask. I was just looking at that screenshot yesterday and thought to myself... "Did I post a Gnome screenshot by mistake?" I' wondered because of the folder icons in Thunar, which currently doesn't properly use user-dirs.dirs to set custom folder icons, you have to attach emblems to them. Looking closer, I think I was testing Nautilus Elementary on Xfce.
Anyway, it's all in the tutorial, but to save you the trouble the GTK+ and icons are Shiki-wise/Gnome-wise. If you run Debian...
sudo apt-get install shiki-wise-theme
The Emerald theme is komar-blue with the engine switched to truglass in the Emerald Theme Manager...
http://gnome-look.org/CONTENT/content-f
ue.emerald