Vintage Edwardian floral octagonal Pietra Dura brooch. Delicate shades of mauve, forest, olive, periwinkle & white stone or glass set into a black background, of what is most likely onyx. Set in a silver plated metal setting with safety pin clasp. Great condition. You can see some tiny fleabites to the inset pieces if viewed with magnification. 1-3/8 x 7/8 inches.