Assertion: tourmaline | /r/HasProperty | pink
Facets:
Source sentences:
text: They include the gem varieties of quartz (colorless, rose, smoky, and amethyst), beryl (as blue aquamarine and pink morganite), and tourmaline (pink, green, blue, and multicolored).
text: The most expensive tourmalines are the pink (rubellite), green (verdelite) and blue (indicolite).