Assertion: bloodstone's variety | /r/HasAspect | unique optical properties
Facets:
value: very
type: DEGREE
Source sentences:
text: This popular variety has very unique optical properties in the form of a bronze sheen that is caused by the fibrous mineral Crocidolite that was chemically replace d into Chalcedony through pseudomorphism Impurities are frequently present in Chalcedony.