solid homogeneous inorganic substances occurring in nature having a definite chemical composition

relating to or made of quartz

a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite

a type of igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture.

Migmatite is a rock that is a mixture of metamorphic rock and igneous rock.

a phaneritic texture intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar.

a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators

a clear quartz used in making electronic and optical equipment

a smoky yellow or brown quartz

a transparent purple variety of quartz; used as a gemstone

a milky or greyish translucent to transparent quartz

a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite

a type of igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture.

Migmatite is a rock that is a mixture of metamorphic rock and igneous rock.

a phaneritic texture intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar.