1.600 million years old <a href="https://en.wikipedia.org/wiki/Rapakivi_granite" class="extiw" title="en:Rapakivi granite">Rapakivi granite</a>, coming from the <a href="https://en.wikipedia.org/wiki/%C3%85land" class="extiw" title="en:Åland">Åland Islands</a> in Finland, in the glacial erratic garden between the villages Klein Briesen and Ragösen in the nature park <a href="//commons.wikimedia.org/wiki/Naturpark_Hoher_Fl%C3%A4ming" title="Naturpark Hoher Fläming">Naturpark Hoher Fläming</a>. The villages are parts of the town <a href="//commons.wikimedia.org/wiki/Bad_Belzig" title="Bad Belzig">Bad Belzig</a> in the district <a href="//commons.wikimedia.org/wiki/Landkreis_Potsdam-Mittelmark" title="Landkreis Potsdam-Mittelmark">Potsdam-Mittelmark</a>, state <a href="//commons.wikimedia.org/wiki/Brandenburg" title="Brandenburg">Brandenburg</a>, Germany.
<a href="//commons.wikimedia.org/wiki/User:Lienhard_Schulz" title="User:Lienhard Schulz">Lienhard Schulz</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>