adjective. Containing, resembling, relating to, or consisting of silica.

See silicious.

adjective. Of or pertaining to silica; containing silica, or partaking of its nature.

adjective. of, relating to, consisting of, or resembling silica

adjective. relating to or containing or resembling silica

"The researchers found that while a vast majority of the minerals that make up ash are highly reactive and soon decay, about two percent by volume are made up of a stable group of minerals called siliceous aggregates."

Carboniferous  argillaceous  bituminous  brownish  calcareous  

silicious  

silisious