Welcome,
You have a lovely necklace of cultured freshwater pearls (from China). The clasp 925 means sterling silver. I can't decipher the other mark, perhaps the maker of the clasp.
Pearls
Shapes of the pearls are off round, oval, drop and button, which are less valuable than round. Pearls in this size and shape cost wholesale about $5-$10 per strand. These pearls appear to have been nucleated with a tiny piece of mantle tissue, so the pearl is pretty much all nacre, meaning that with care they will last a long time and never wear through to a bead center.
If you purchased this necklace in a fancy boutique it could cost over $100, but you could probably find something similar online for under $100.