Aerinite
From Wikipedia, the free encyclopedia
Aerinite (or Aerinit or Aerinita) Ca4(Al,Fe,Mg)10Si12O35(OH)12CO3ยท12H2O is a mineral of calcium, aluminium, iron, magnesium, silicon, oxygen, hydrogen, and carbon. Its name comes from a Greek root meaning "atmosphere" or "sky". Its Mohs scale rating is 3.