Assertion: blue topaz | /r/HasProperty | available in wide range of vivid hues
Facets:
value: with a striking vitreous luster
type: OTHER
Source sentences:
text: Topaz is a very hard material - 8 on the Mohs hardness scale - and blue topaz is a very pretty stone that is available in a wide range of vivid hues with a striking vitreous luster.