The glass stone in this Czech pin was designed to resemble agate. It's really beautiful with swirly colors of blue, green, purple and plum. The setting looks to be made of stamped brass with large decorative filigree prongs. There is a thin brass braid that runs around the base of the pin and through the prongs. It is stamped on the C-catch what I think is Czechoslovakia. The pin measures 1 1/2" X 7/8" and is in very nice condition with no chips on the glass stone.