Elephant hair in jewelry? Yes!
About elephant hair jewelry, here is a short story found in a book:
" In 1923, as I was preparing to return to Ceylon, I visited him <…> Among several very original and somewhat unusual costume jewels, he showed me a wide range of strange jewels made with a new material: elephant hair. <…> Another jewel was a large gold ring, like a wedding ring with four hairs attached. It could be separated and two rings appeared where one thought there was only one ."
Ceylon, Island of Gems, Elie L. Menasche
So it seems that "elephant hair jewelry" appeared in France in the 1920s. You can come across this jewelry from time to time but it is not common. In the 1970s, beautiful pieces were produced (see Fred's bracelets and rings), but in 1975 the CITES law banned the trade in elephant hair, among other organic materials.
Elephant hair is a beautiful, dark, thick material that pairs incredibly well with yellow gold. Since it is rare and comes from a living being, enjoy your jewelry even more and take good care of it.