Kaolinite in "Peña del Hierro" mine in <a href="https://en.wikipedia.org/wiki/Nerva,_Spain" class="extiw" title="en:Nerva, Spain">Nerva</a>. (<a href="https://en.wikipedia.org/wiki/Province_of_Huelva" class="extiw" title="en:Province of Huelva">Huelva</a>, <a href="https://en.wikipedia.org/wiki/Spain" class="extiw" title="en:Spain">Spain</a>)
<a href="//commons.wikimedia.org/wiki/User:David_Perez" title="User:David Perez">David Perez</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>