underthescopemineral: Calciojohillerite NaCaMg3(AsO4)3Locality:Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka Oblast’, Far-Eastern Region, Russia Field of View: 2.5 mm Collection
tags: So many OTPs,
from: https://eikuuhyo.tumblr.com/post/162269647487