Assertion: quartz | /r/HasProperty | stable
Facets:
value: under normal conditions
type: TEMPORAL
Source sentences:
text: The other polymorphs are stable at different and sometimes very special conditions, mostly high temperatures and high pressures, but some of them may also form at low temperatures and pressures under conditions where quartz is stable.
text: Judging from the geotherms, α-quartz will be the stable form of silica in the entire continental and oceanic crust under normal conditions.