Vintage rhinestone 4-piece jewelry set

Received from my grandmother. She used to wear these when she was younger 💎 Necklace, bracelet, and earrings full set. The earrings have a twist backing (similar to clip-on’s, perfect for people with no piercings). These would be fun for a 1930s/1940s party-themed costume party. In great condition. Only missing 1 stone from the necklace (8th stone from the back clasp on the left side, not noticeable from the front). Measurements: necklace - 38cm (15 in), cm (in) wide bracelet - 17.5cm (7 in) long, cm (in) wide earrings - 3cm (1.2 in) long, cm (in) wide Material: unknown…stainless steel? Sterling silver?