Assertion: pyrrhotite | /r/HasProperty | rare
Facets:
value: in connecticut
type: LOCATION
value: pretty
type: DEGREE
Source sentences:
text: pyrrhotite is pretty rare in Connecticut, but according the U.S. Geological Survey, it is found in Willington at Becker’s Quarry.
text: The stone aggregate supplied by that quarry contained pyrrhotite, a rare mineral that causes concrete to slowly deteriorate if exposed to oxygen and water.