An electron micrograph of volcanic sublimates (minerals) in natural colors. Abundant micron-sized crystals of thallium iodide TlI (an unnamed mineral in fumarolic incrustations, Mutnovsky volcano, Kamchatka). The mineral has two polymorphs – yellow and red, with a gradual transition between the two. The crystals are located on a substrate of altered rock. Image size is 700 microns along the long side.
<a href="//commons.wikimedia.org/w/index.php?title=User:Ppm61&amp;action=edit&amp;redlink=1" class="new" title="User:Ppm61 (page does not exist)">Зеленский Михаил Евгеньевич</a>
<span class="int-own-work" lang="en">Own work</span>