Definition that contains feldspar
- si 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
- granite plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz
- silicon 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
- spar any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable
- basalt the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene
- moonstone a transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar
- orthoclase a white or colored monoclinic feldspar
- china clay a fine usually white clay formed by the weathering of aluminous minerals (as feldspar); used in ceramics and as an absorbent and as a filler (e.g., in paper)
- porcelain clay a fine usually white clay formed by the weathering of aluminous minerals (as feldspar); used in ceramics and as an absorbent and as a filler (e.g., in paper)
- oligoclase any of a series of triclinic feldspars that form rocks