Definition of feldspar in English:
An abundant rock-forming mineral typically occurring as colourless or pale-coloured crystals and consisting of aluminosilicates of potassium, sodium, and calcium.
- Quartz is associated most commonly with aegirine and potassium feldspar as well as zircon.
- Larger crystals of feldspar and quartz dominate the host rock.
- These granite dikes are composed almost totally of potassium feldspar and quartz.
Definition of feldspar in:
- US English dictionary
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