Victorian Faux Freshwater Pearl and Genuine Swarovski Necklace

Victorian faux freshwater pearl and genuine Swarovski crystal choker necklace, inside strand measuring 13” with a 3” extender. My family was able to verify ownership of this necklace to my great great grandmother who would have worn it in the 1850s, and it could even be older. We are keeping most of her jewelry, but we wanted to give this beauty a shot on the market and see if it had any takers. The value of this necklace is an educated guess on my part based upon the cost of these type of beads today and my knowledge of antiques. Please see photo with a penny for size comparison of the beads. I welcome reasonable offers. Please refer to offer guidance chart.