Assertion: tourmaline's color | /r/HasProperty | stable
Facets:
value: as long as there is
type: OTHER
Source sentences:
text: The yellow color that can be formed, along with a stronger pink from the oxidation of manganese in the crystal by radiation, is only stable as long as there is a crystal matrix that can accept the dislocated subatomic particles (protons or electrons).
text: Although some fading may occur, beyond a certain point, the color seems to be stable.