Assertion: amber | /r/HasProperty | unique
Facets:
Source sentences:
text: Amber is unique and has amazing results which are all natural.
text: Amber is a unique preservational mode, preserving otherwise unfossilizable parts of organisms; as such it is helpful in the reconstruction of ecosystems as well as organisms; the chemical composition of the resin, however, is of limited utility in reconstructing the phylogenetic affinity of the resin producer.
text: It is unique and beautiful and can be quite expensive when the pieces are exquisite, or contain rare organic inclusions – insects or plants, which are extinct for a long, long time.