jul 9th, 2011 CE
it is the famous meteoric rock that is venerated by mohammedans. it was broken into a number of pieces at some point in the past. it is the eastern cornerstone of the kaaba, the black cubical building.
here are the images from a google search for 'eastern cornerstone of the kaaba': http://www.google.com/search?q=Eastern+cornerstone+of+the+Kaaba&hl=en&prmd=ivnsfd&source=lnms&tbm=isch&ei=Uz0XTrP2J4jirAff-PTPAQ&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CAwQ_AUoAQ&biw=1024&bih=485