<p>In the collections of the <a href="https://en.wikipedia.org/wiki/Rice_Northwest_Museum_of_Rocks_and_Minerals" class="extiw" title="w:Rice Northwest Museum of Rocks and Minerals">w:Rice Northwest Museum of Rocks and Minerals</a> in <a href="//commons.wikimedia.org/wiki/Hillsboro,_Oregon" title="Hillsboro, Oregon">Hillsboro, Oregon</a>, USA.
</p>
<a href="https://en.wikipedia.org/wiki/Silicon_dioxide" class="extiw" title="w:Silicon dioxide">w:Silicon dioxide</a>, human made quartz crystal from Russian Research Institute of the Synthesis of Materials in Alexandrov
<a href="//commons.wikimedia.org/wiki/User:Aboutmovies" title="User:Aboutmovies">M.O. Stevens</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>