Granulite with quartz, feldspars (plagioklase -  light and dark grey), biotite (black) and pirope (dark red) from Zagórze Śląskie near Świdnica, in the Owl Mountains, Lower Silesia, Poland.
<a href="//commons.wikimedia.org/wiki/User:Kosioryt" title="User:Kosioryt">Piotr Sosnowski</a>
<span class="int-own-work" lang="en">Own work</span>(own work by uploader)