Vintage 20s Graduated Hand-Carved (probably faux) Ivory Bead Necklace

I know nothing about this amazing necklace. I was lucky enough to see where one had sold in the past. See the photos to determine the quality and condition of this beautiful piece. It appears to be in excellent condition as I hold and inspect it. Treasure from the past. Art deco graduated bead necklace with a twist bead closure. Excellent vintage condition. It is 16 inches long. Please note: this is way beyond my expertise. I do not know if this is ivory, I believe it is faux or bone based on my reading. Please do your research if this matters to you. To me the fact that it is lovely, beautiful, and old is what matters to me.