Assertion: onyx | /r/HasProperty | banded black
Facets:
Source sentences:
text: When Onyx is banded black and white, it can be jointly classified as both Agate and Onyx.
text: Onyx , when banded white and black, is technically a form of Agate, and Sardonyx , which is a banded reddish and white Chalcedony, is also technically a type of Agate.