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.
What is a Kimberlite? Kimberlite is a 'hybrid' rock composed of fragments of peridotite and eclogite derived from beneath the deep crust in the upper mantle of the earth, as well as fragments of various rock types derived from higher levels in the crust.