Vintage ring from the 1930s-40s, three different ones

Three different old rings, from around the 1930s-40s. All are intact and in working order. Materials unknown.

1. Small ring with a white flower. Possibly a children's ring or a small ring. Size 14.

2. A gracefully designed women's ring with a dark red teardrop-shaped spot in the center. Size (19.5)20.

3. A slightly more roughly crafted women's ring with a red and clear pearl. Size 18.