Vintage MMA signed necklace earrings pin

Vintage gold tone and red jewelry lot. 3 are signed. The 19” chain necklace has a 1” red aluminum (?) flower pendant with a clear crystal. Beautifully set in individual bezels. Signed DMO 98. The 2.5” arrow pin has a carnelian bead and is signed MMA (Mass Museum of Art). The 1/4” red garnet post earrings are signed Avon. The 1.5” gold and red earrings are clip on.