Assertion: crystalline silica | /r/HasProperty | formed
Facets:
Source sentences:
text: For example, when diatomaceous earth, an amorphous form of silica, is calcined (heated to a high temperature), crystalline silica can be formed.
text: Crystalline silica, a form that includes quartz, can be toxic if inhaled.
text: Additionally, crystalline silica can be formed if plants containing amorphous silica are burned at high enough temperatures.