A form of "earth manipulation":/https://e621.net/wiki_pages/30714 that specifically focuses on the manipulation, creation, and control of "crystals":/https://e621.net/wiki_pages/2735.
The user can create, shape and manipulate crystals and crystalline materials: homogenous solids formed by a repeating, three-dimensional pattern of atoms, ions, or molecules and having fixed distances between constituent parts. Users of this power can manipulate various types of crystals, such as quartz, diamonds, rubies, etc.