Assertion: crystalline silica | /r/HasProperty | ubiquitous substance
Facets:
value: in nature
type: LOCATION
Source sentences:
text: Crystalline silica is a ubiquitous substance which is the basic component of sand, quartz and granite rock.9
text: Crystalline silica (SiO2) is ubiquitous in nature, where it forms 12% of the Earth crust.
text: Crystalline silica is a ubiquitous compound found in soil, sand, granite, and other minerals.
text: In addition some recently noted exposures to crystalline silica include the following: Crystalline Silica and SilicosisCrystalline silica is a ubiquitous substance which is the basic component of sand, quartz and granite rock.