The Black Vintage (1800s) Vulcanite/Gutta-Percha Pin Brooch is an Antique Victorian piece from the Victorian era. Made before 1920 in the United States, this handmade brooch features a black vulcanite or gutta-percha, reflecting craftsmanship of the time. This unique and vintage accessory exudes a sense of history and elegance, perfect for those who appreciate antique jewelry.

I have this narrowed down to one of the two rubber like materials that were used during this time period to fashion mourning broaches.