feldspar
feld spor
- n any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
- With no Government money, as Borglum had, Ziolkowski hoped to finance his work by mining the mountain's beryl and feldspar as he went along and selling Indian souvenirs to curious .
- The Davidsons claim that their grit is ideal because it contains sparkling particles of feldspar and mica which attract a hungry hen's eye.
- But the present cost of processing feldspar is far more than $40 a ton, the gage for fertilizer potassium.