There are seven runestone quality levels, roughly distributed so that levels one through three are found as a character progresses through Normal, four and five are found in Nightmare, and six and seven are found in Hell. Higher level runestones (each runestone's quality can be distinguished determined by additional the number of points around their perimetersits edge). It's not known how common or rare high level runestones will be, or whether or not all five types will be equally difficult to find. The most recent information about it came from a forum post by [[Bashiok]] in January 2011.<ref>[http://diablo.incgamers.com/blog/comments/runestone-info-galore/ Bashiok forum post] - Blue Tracker, January 12, 2011</ref>