"Silicious" is a word in ENGLISH

A mineral of the feldspar family, triclinic in crystallization, and in composition a silicate of alumina and soda. It is …

A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally …

Any one of several varieties of friable earthy clay, usually colored more or less strongly red by oxide of iron, …

A rock, composed or rounded fragments of stone cemented together by another mineral substance, either calcareous, siliceous, or argillaceous; pudding …

A siliceous sponge, of the genus Hyalonema, and allied genera; -- so called from their glassy fibers or spicules; -- …

The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron …

A genus of hexactinelline sponges, having a long stem composed of very long, slender, transparent, siliceous fibres twisted together like …

A kind of mica having generally a peculiar bronze-red or copperlike color and a pearly luster. It is a silicate …

Order of rhizopods, usually having a siliceous skeleton, or shell, and sometimes radiating spicules. The pseudopodia project from the body …

Silica, SiO2 as found in nature, constituting quarz, and most sands and sandstones. See Silica, and Silicic.

A mineral of a white to yellowish, purplish, or emerald-green color, occuring in prismatic crystals, often of great size. It …

A siliceous stone of a yellow color and chatoyant luster, obtained in South Africa and much used for ornament. It …