Feldspar
in example sentence
These are quartz crystals and
feldspar
, so most sand in the world on the mainland is made of quartz crystal and
feldspar
.
More example sentences with word feldspar
It was made of black, glassy lava mixed with bits of
feldspar.
The walls assumed a crystallised though sombre appearance; mica was more closely mingled with the
feldspar
and quartz to form the proper rocky foundations of the earth, which bears without distortion or crushing the weight of the four terrestrial systems.
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