I bought my stepmum a long leather wallet type thing for Christmas to keep all her necklaces in, it has clips/hooks at either end to hold the necklaces in place and then folds over on itself and clips shut, I think the one I got her held about 20 necklaces if fine chains and 10 if all with bulky pendants on.
It really is fab as she is not the type of person who wants all her jewellry on show so she just pops it away in the top draw of her dresser as it just lies flat.