Assertion: crystalline silica | /r/AtLocation | sand
Facets:
value: naturally
type: MANNER
Source sentences:
text: Crystalline silica (silica) is found in sand, stone, concrete and mortar.
text: Crystalline silica is a known carcinogen found in sand, stone and artificial stone.
text: Crystalline silica is a common mineral that is found in materials such as stone, artificial stone, sand, marble, and most commonly - quartz.
text: Crystalline silica is naturally found in soil, sand, granite, and many other minerals used within the concrete industry.
text: Crystalline silica is a ubiquitous compound found in soil, sand, granite, and other minerals.
text: Crystalline silica is a common mineral that is found in construction materials such as sand, stone, concrete, brick, and mortar.