Assertion: chrysoprase's tone | /r/HasProperty | known in the trade
Facets:
value: as swiss blue topaz
type: OTHER
value: as sky blue topaz
type: LOCATION
value: usually
type: TEMPORAL
Source sentences:
text: Blue topaz can be found in both lighter and darker tones, usually known in the trade as sky blue topaz, Swiss blue topaz and London blue topaz.