A sample of <a href="https://en.wikipedia.org/wiki/ammonium_chloride" class="extiw" title="w:ammonium chloride">ammonium chloride</a> (NH<sub>4</sub>Cl).
Picture taken August 2005 by <a href="//commons.wikimedia.org/wiki/User:Walkerma" title="User:Walkerma">User:Walkerma</a>.
August 2005 ; 24 August 2005 (according to <a href="https://en.wikipedia.org/wiki/Exchangeable_image_file_format" class="extiw" title="en:Exchangeable image file format">Exif</a> data)