Assertion: blue chalcedony | /r/Synonym | african blue
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Blue chalcedony from Namibia, often called “African Blue,” varies from grayish to nearly pure blue and from light to medium dark.
text: Blue chalcedony from Namibia, often called “African Blue”, varies from grayish to nearly pure blue and from light to medium dark.