Assertion: amethyst | /r/HasProperty | part of the five cardinal gems
Facets:
value: in the old world
type: LOCATION
value: long ago
type: TEMPORAL
Source sentences:
text: Not long ago, amethyst were part of the five cardinal gems considered the most valuable, diamond, emerald, ruby and sapphire being the other four.
text: In the Old World, amethyst was considered one of the Cardinal gems, in that it was one of the five gemstones considered precious above all others, until large deposits were found in Brazil.