Vintage Giant brooch

Stunning Vintage piece with big crystals that is very regal and detailed. It is very large at 2 3/4” x 2 3/4” at widest points. It was purchased at an exclusive vintage store in New York. There is one corner that seems to have a line separating the metal on the top right but it was purchased this way and is secure. A few stones are darker than others due to the piece being vintage.