Assertion: black tourmaline | /r/Synonym | schorl
Facets:
value: aka
type: LOCATION
value: more properly
type: DEGREE
Source sentences:
text: Black Tourmaline is more properly called Schorl.
text: Black Tourmaline aka Schorl
text: At the opposite end of the spectrum, the black tourmaline known as schorl is the most common and least expensive of all the tourmaline varieties.
text: Black tourmalines are also called schorl and are the most common.