Assertion: amorphous silica | /r/MadeOf | kieselgur
Facets:
value: from vitreous silica
type: OTHER
value: from the skeletons of diatoms
type: OTHER
Source sentences:
text: Amorphous silica consists of kieselgur (diatomite), from the skeletons of diatoms, and vitreous silica, produced by heating and then rapid cooling of crystalline silica.