Assertion: flint | /r/HasProperty | hard
Facets:
Source sentences:
text: Flint is also too hard for humans to cut anything fancy like lines, patterns, designs, or faces.
text: Flint is a hard rock that is often found in areas rich in limestone and other sedimentary rocks.
text: Flint is a hard type of quartz that is typically categorized as a type of chert.
text: Feldspar, a mineral comprising mostly aluminum silicate, and flint, a type of hard quartz, function as fluxes in the porcelain body or mixture.
text: Flint is one of the hardest materials, close behind diamond