The series premiered on demand on November 23, 2015, and on Syfy on December 14, 2015. A 13-episode second season premiered on February 1, 2017. In March 2017, Syfy renewed The Expanse for a 13-episode third season to air in 2018.
Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian.
Best Answer: Phyllite is a metamorphic rock that was once slate and was on the way to becoming a mica schist under the temperature and pressure of metamorphism. The flakes you see are mica, which are not dangerous at all. Phyllite has some chlorite in it, which is a greenish mineral, so if you don't see anything like that, the rock might be a mica schist. Your rock is certainly rare over most of the US. but where it does occur it can generally be found in fairly large quantities.