Assertion: african elephant's tusk | /r/MadeOf | ivory
Facets:
Source sentences:
text: Elephants are known for their large ears, tusks made of ivory and their trunks – which are actually a fusion of their nose and upper lip.
text: Tusks are made of ivory, which is an incredibly dense form of bone.
text: That's because tusks are made of ivory, which is very valuable.
text: Because their tusks are made of ivory, they have been used for numerous reasons such as billiard balls, dice, piano keys, and most commonly, decorative carvings.