This is a lovely 1920s Art Deco Brooch in a pretty blue that is a light shade of cobalt. The white metal( possibly Rhodium) setting is typical of the era, with beautiful filigree and a locking "C" clasp on the back. It is 1 3/8" square.

The faceted blue glass stone seems to be light in itself. It's surrounded by pretty filigree, with one prong-set glass stone on two corners.

This lovely pin would be perfect for closing the neck of a blouse or dress or would look at home on a 1920s cloche-style hat.

This type of Art Deco and 1920s style jewelry brings to mind film and TV productions like “Miss Fishers Mysteries”, “Timeless”, and “ The Great Gatsby”