Assertion: pyrite's gold | /r/HasAspect | a hardness of 2.5
Facets:
Source sentences:
text: For comparison, quartz has a hardness of 7, diamond has a hardness of 10, and gold has a hardness of 2.5.
text: Gold has a hardness of about 2.5, while pyrite is about 6 (Gold is softer and more malable).
text: Gold is a very soft mineral while Pyrite is much harder (gold has a hardness of 2.5 while Pyrite is 6.5).