Signed K J with an arrow through it. Ornate antique Kollmar & Jourdan brooch. Very detailed pin with rhinestone center. Safety clasp is the type that was used in the mid to late 1890's. Measures 2 and 1/2 inches across. Kollmar & Jourdan was a company from Germany. The black material appears to be jet. It leaves a black streak when gently rubbed on unglazed tile.