Assertion: precious opal | /r/HasProperty | primary gem form of this stone
Facets:
Source sentences:
text: Gems are cut from both the precious and common forms, but precious opal is the primary gem form of this stone.
text: Gems can be cut from both the precious and common forms, but Precious Opal is the primary gem form of this stone.
text: Gems can be cut from both the precious and common forms, but Precious Opal is the primary gem form of this stone.