Turquoise Black Pearl Silver Bead 30 Inch Long Necklace and Dangle Earrings Set

Here is a lovely artisan-made necklace and earring set. The necklace is quite long, features turquoise (probably genuine) and black pearls (presumably synthetic) on a silver-tone chain. No marks on these pieces, but the ice test to the chain showed them melt ice at a faster rate than room temp, so perhaps they may be silver-plated? I'm not a jewelry expert, so selling these as costume jewelry. The fishhook style ear wires have a bit of wear to the finish. Estimated around 25 years old. Measurements: Earrings -- 1.5 inches long x 1 inch wide Necklace -- 30.5 inches long