1) Oxide 2) Silicious 1) Silicious 
• (a.) Of or pertaining to silica; containing silica, or partaking of its nature.
Containing silica. ... (09 Oct 1997) ... 
Silica-bearing rock.
Sandy.
Si·li'ceous adjective [ Latin siliceus , from silex , silicis , a flint.] Of or pertaining to silica; containing silica, or partaking of its nature. [ Written also silisious .] 
Type: Term Pronunciation: si-lish′ŭs Definitions: 1. Containing silica. Synonyms: silicious
Silica-bearing rock.
[adj] - relating to or containing or resembling silica
consisting in a noteworthy part of silica, typically quartz. 
silicious adjective relating to or containing or resembling silica; `gritrock is siliceous sandstone`
Incoporating silica. 
A rock containing an abundance of quartz.
A rock containing an abundance of quartz.