Assertion: basalt | /r/HasProperty | opaque
Facets:
value: in nature
type: LOCATION
Source sentences:
text: Because basalt is opaque, it is more difficult to uniformly heat than glass is, and this has created a need for production enhancements such as keeping the molten product in a reservoir for an extended period, the immersion of electrodes in the bath, or a two-stage heating scheme.
text: Basalt is opaque in nature whereas its toughness is 2.3.