Very old Ivory and Coral Choker Necklace may Yemeni?

Hi I have had this many years and was wondering if anyne know where it

might be from or which era it might be from.

It looks and feels as if it has a lot of history

I also have a pre 1947 ivory rose carved necklace and another

that is exactly the same but needs restrung

Will get round to it one day

Thanks annmac