I would date these wonderful rose quartz beads back to about 1930. They cast more of a peach hie than rose and are hand tied with a salmon thread. It may very well be the original and I will leave it up to the new owner to decide if it should be changed.
The 36'' strand features beads of 3/8''. They are not polished and almost a little rough. The clasp is hallmarked 14K. Age appropriate wear.