For your consideration is this outstanding pietra dura brooch. I took a picture in the outside light so that you can fully appreciate this masterpiece. The masterful mosaic sets in a fancy filigree 800 silver setting and it is marked 800 on the clasp. The clasp is the tube or trombone type that was first used in 1890. The doves of pliny and beautifully displayed and this piece is breath taking.
It measures 1 and 3/4 inches by 1 and 3/8 inches.
It is in excellent functioning condition with these two exceptions 1) The back could use a slight cleaning and 2) around the edge of the setting you can see evidence of the glue that was used in the making. I think a jeweler could possibly clean this but I don't think it is a big deal and I took a side pic of the worst case.