An electron micrograph of volcanic sublimates (minerals) in natural colors. Pentavalent arsenic sulfide As2S5, droplets of solidified melt, an unnamed X-rays amorphous mineral, fumarolic incrustations, Mutnovsky volcano, Kamchatka. Colorless small crystals are an unnamed mineral with a composition NH4As4O6I, which is an iodine analogue for lucabindiite (K,NH4)As4O6(Cl,Br). A cuboctahedral crystal of pyrite FeS2 (above the center) and a crystal of Mg-Fe sulfate (bluish at the top) are also visible. Image size is 700 microns along the long side.