Assertion: glass | /r/MadeOf | silica
Facets:
value: mainly
type: DEGREE
Source sentences:
text: Glass is mainly made of silica; glass made of silica only is called silica glass.
text: Common sand and glass are both made primarily of silicon and oxygen, yet sand is opaque and glass is transparent.
text: Glass is mainly made of silica; glass made of silica only is called silica glass.