Assertion: tourmaline's color | /r/CapableOf | arrange in concentric bands
Facets:
value: about the center of the crystal
type: LOCATION
value: in transverse layers along its length
type: LOCATION
Source sentences:
text: A single crystal may show several different colors either arranged in concentric bands about the center of the crystal or in transverse layers along its length.
text: A single crystal may show several different colors either arranged in concentric bands about the center of the crystal or in transverse layers along its length.