GIFTED Vintage Sterling & Amethyst Necklace

Vintage sterling silver and real amethyst necklace. Measures a smidge over 16” with a 2” extender. Lobster claw clasp is marked 925 and link is stamped sterling with a maker’s mark. Tiny amethyst at the end of chain. Amethyst stones are scratched and a couple have some white coloring throughout which I think is from the jeweler steaming it. I took this in to be professionally cleaned. It has sat in my jewelry box for 25+ years. Please see photos.