Antique Goofus Glass Intaglio Foral Pin

Art Nouveau intaglio goofus glass pin that is reverse painted.  Octagon in shape, it has a pink flower on a silvery background.  The pin is framed in gold metal, probably brass, with a C catch on the back, the metal is probably coin.  It measures 1 3/8" x 7/8" and dates to the early 1900's.  The condition is good, with vintage wear consistent with age.