Disc Brooch Ornamented With Filigree, Garnet, And Glass

The circular gold plate with central boss attaches to a backing plate of tinned bronze with a catch plate that once held an iron pin, now corroded away. The surface of the disc is covered with tiny circles of twisted filigree. On the central boss are gold cells, in the center a circular cabochon of blue glass surrounded by three triangles of flat garnet, all bordered with twisted wire. Around the outer flat area of the disc are three rectangular cells with flat garnets alternating with three circular cells with blue glass. Alongside the rectangular cells are small, circular cells set with white mother of pearl
(or meerschaum?). There is also an outer border of twisted wire.