Aluminium, reinst 99,9%, geätzt mit deutlich sichtbaren Kristalliten
<a href="//commons.wikimedia.org/wiki/User:Alchemist-hp" title="User:Alchemist-hp">Alchemist-hp</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Alchemist-hp" title="User talk:Alchemist-hp"><span class="signature-talk">talk</span></a>) (<a rel="nofollow" class="external text" href="http://www.pse-mendelejew.de">www.pse-mendelejew.de</a>)
CC BY-SA 2.0 de
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">eigene Arbeit</bdi></i></span>)