Assertion: asbestos's fiber | /r/HasProperty | fine
Facets:
Source sentences:
text: Unlike most minerals, which turn into dust particles when crushed, asbestos breaks up into fine fibers that are too small to be seen by the human eye.
text: The fibers in these types are fine, sharp, and brittle.
text: Crocidolite is the most dangerous asbestos mineral because its fibers are fine and sharp.