A sample of <a href="https://en.wikipedia.org/wiki/Arsenic(III)_oxide" class="extiw" title="w:Arsenic(III) oxide">Arsenic(III) oxide</a>.
Picture taken by <a href="https://en.wikipedia.org/wiki/User:Walkerma" class="extiw" title="w:User:Walkerma">w:User:Walkerma</a> in June 2005.
2005-06
<span class="int-own-work" lang="en">Own work</span>