Look up Victorian Mourning customs. Jewlery make of hair, crepe for veils and the bit around the hat, unrelieved black and so on. Maybe a wreath of black roses with metal and clockwork bits. Here is a site on fabric. http://members.tripod.com/~Miss_Kady/fabrics.html
Alot of Victorian mourning clothes would shatter or fall apart because of the type of fabric used. So maybe a raged look at the collar, cuffs, and hem?