Assertion: quartz | /r/MadeOf | pure silica
Facets:
value: almost
type: DEGREE
Source sentences:
text: Quartz glass is made from almost pure silica (SiO2 ≥ 99.9%) that makes it a heat proof glass.
text: Quartz glass is made from almost pure silica (SiO2 ≥ 99.9%) that makes it a heat proof glass.