DECO STERLING SILVER ONYX TIGER EYE MARCASITE BROOCH & EARRINGS. 1930, Featured is a 1930 ART DECO Brooch and earring set. The set consists of marcasite stones,onyx and tiger's eye. The sterling silver settings are hallmarked. The earrings are clip on and the triangle dangles as does the brooch triangle. Excellent condition. Brooch: 3"x 2.5", Earrings: 1.25" x 2".