fuckyeahmineralogy: These are all cross sections of stalactites, which occur when minerals form in long, tube-like shapes. They typically form in caves or hollow spots in rocks where they have plenty of room and time to grow.  Featuring amethyst (SiO2),

fuckyeahmineralogy: These are all cross sections of stalactites, which occur when minerals form in long, tube-like shapes. They typically form in caves or hollow spots in rocks where they have plenty of room and time to grow.  Featuring amethyst (SiO2),

tags: So many OTPs,

from: https://eikuuhyo.tumblr.com/post/149592139285