Assertion: calcite's crystal | /r/MadeOf | flat faces
Facets:
value: with sharp angles
type: OTHER
value: with specific, characteristic orientations
type: OTHER
Source sentences:
text: In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations.
text: Crystals are commonly recognized by their shape, consisting of flat faces with sharp angles.