Assertion: amber | /r/HasProperty | hard
Facets:
value: essentially
type: DEGREE
value: very
type: DEGREE
value: often
type: DEGREE
Source sentences:
text: Amber is often very hard to seperate from its imitations due to overlapping physical and optical properties.
text: Younger amber is often called copal, though it is essentially as hard and its physical properties differ little from older resins.