Vintage Designer Signed Zina Sterling Silver & 14K Gold Amethyst Ring Size 7 Add a touch of vintage glamour to your collection with this stunning Zina designer ring. The ring features a beautiful oval shaped natural amethyst stone set in a tension style 14K yellow gold and sterling silver band. The two-tone band is handcrafted and signed by the designer, making it a true beauty. The purple stone and silver and gold color combination make it a timeless classic.