Alta Quartzite
Quarried up in the Arctic Circle this is the finest roofing “slate” in the world. The sizes are somewhat limited but the stone will last for well over 200 years as there are buildings with this stone on it that look as good as the day it was installed. Virtually indestructible as it is acid resistant and imperious to water this roofing offers beauty and durability. Colors range from grey/green to green/gray with the former being tighter grained and the latter being more open grained.
