Assertion: alloy | /r/HasProperty | brass
Facets:
Source sentences:
text: Some alloys are called bronze when they are actually brass, such as "commercial bronze" which is made from copper and zinc.
text: (Sphalerite (ZnS with more or less iron), for example, is not uncommon in copper sulfide deposits, and the metal smelted would be brass, which is both harder and more durable than copper.)