What are the different sources of ivory? are narwhals extinct?

Question

my bro and i are in a dispute 1- whatare different sources of ivory

2- are narwhal among them?

3- narwhal cant be among them because they are extinct! but now im unsure

Answer 1

walrus and elephant.

i dunno about narwhals though... arent their horns keratin? like rhino horns? hmm..

no they arent extict, they are just rare

Answer 2

narrwhals are not extinct and can be a source of ivory however according to the website I'll attach the only "true ivory" is from the tusks of elephants

http://www.melfisher.org/aboutivory.htm

Answer 3

In addition to walrus and elephant, some call hippo tusks "ivory", and the two upper canines of elk are referred to as ivories.