Assertion: flint | /r/ObjectUse | used for material
Facets:
value: with a slightly higher luster
type: OTHER
value: with a very fine grain size
type: OTHER
Source sentences:
text: The name "flint" is often the preferred name used for material with a very fine grain size and a slightly higher luster.
text: Chert" and "flint" are names used for the same material.