Assertion: silica's form | /r/HasProperty | quartz
Facets:
Source sentences:
text: Crystalline silica (or silicon dioxide, SiO 2 ) is a mineral that is naturally found in the Earth’s crust and whose three main forms are quartz, cristobalite and tridymite.
text: The most common form of silica is quartz, a component of stone, concrete, and sand.
text: The most common form is quartz.
text: The most common form of SiO2 is quartz – a chemically inert and relatively hard mineral.
text: The most common form of crystalline silica is quartz.
text: The three major forms: quartz, cristobalite and tridymite, are stable at different temperatures.