Board Thread:Speculation House/@comment-25936766-20170825025659/@comment-26397825-20170825033016

You know, volcanic activity could explain the black/midnight blue shapes. Imagine centuries of an active volcano not only spewing out lava, but then the lava solidifying over itself with no interference from man. There is a natural phenominom in our world known as columnar basalt, which is made from volcanic activity in a lot of cases, and it creates that dark blue/black colour. A good example of this is Ganh Da Dia in Vietnam. The most interesting part is actually the hexagonal shapes each piece creates though, which I find really cool.