Antique Victorian Mourning Gold-filled Two-sided Swivel Brooch Enamel Accents

This is a beautiful gold-filled antique Victorian era mourning swivel brooch with two-sides. On one side, there is black glass with a geometric design that is accented with black and white enamel. The glass is chipped at the bottom and has cracked into four pieces. On the other side is a hair receiver that has a piece of paper inside. The glass and possibly contents are missing. Also, on the front two sides of the frame are adorned with crowns. There are areas where the gold has worn away. Aside from the damage, the piece is still in relatively good shape considering it was likely made around the 1870s-1890s. Approximate Dimensions: 1.4in x 1.16in