Assertion: tourmaline's use | /r/CapableOf | change the colour
Facets:
value: completely
type: MANNER
Source sentences:
text: The use of Prussian blue and other dyes (often in conjunction with bonding treatments) to "enhance” its appearance, make uniform or completely change the colour, is regarded as fraudulent by some purists, especially since some dyes may fade or rub off on the wearer.