feldspar : Idioms & Phrases
Glassy feldspar
(Min.) , a variety of orthoclase; sanidine.
Webster 1913
Labrador feldspar
- . See
Labradorite .
Webster 1913
white feldspar
-
noun a widely distributed feldspar that forms rocks
albite.
WordNet
~= feldspar
- a variety of oligoclase with internal firelike reflections due to the presence of minute crystals, probably of hematite; sunstone.