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Definition of feldspar in English: feldspar(also felspar) noun ˈfɛldspɑːˈfɛldspɑr mass nounAn abundant rock-forming mineral typically occurring as colourless or pale-coloured crystals and consisting of aluminosilicates of potassium, sodium, and calcium. Example sentencesExamples - Minerals such as feldspar, which are insoluble in water, will not give a positive test.
- Quartz is associated most commonly with aegirine and potassium feldspar as well as zircon.
- These granite dikes are composed almost totally of potassium feldspar and quartz.
- Its most abundant mineral is feldspar, which accounts for two-thirds of the Earth's crust.
- Larger crystals of feldspar and quartz dominate the host rock.
Origin Mid 18th century: alteration of German Feldspat, Feldspath, from Feld 'field' + Spat, Spath 'spar' (see spar3). The form felspar is by mistaken association with German Fels 'rock'. Definition of feldspar in US English: feldsparnounˈfɛldspɑrˈfeldspär An abundant rock-forming mineral typically occurring as colorless or pale-colored crystals and consisting of aluminosilicates of potassium, sodium, and calcium. Example sentencesExamples - Minerals such as feldspar, which are insoluble in water, will not give a positive test.
- Larger crystals of feldspar and quartz dominate the host rock.
- Its most abundant mineral is feldspar, which accounts for two-thirds of the Earth's crust.
- These granite dikes are composed almost totally of potassium feldspar and quartz.
- Quartz is associated most commonly with aegirine and potassium feldspar as well as zircon.
Origin Mid 18th century: alteration of German Feldspat, Feldspath, from Feld ‘field’ + Spat, Spath ‘spar’ (see spar). The form felspar is by mistaken association with German Fels ‘rock’. |