Assertion: mineral | /r/HasProperty | amorphous
Facets:
Source sentences:
text: Skinner's (2005) definition of a mineral takes this matter into account by stating that a mineral can be crystalline or amorphous, the latter group including liquid crystals.
text: Some minerals, like azurite and malachite, which are both copper ores, don't form regular crystals, and are amorphous (Figure 3).