Assertion: tourmaline's variety | /r/ObjectUse | used as gem stones
Facets:
Source sentences:
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.
text: Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity.