BSK Vintage Cat Kitten Brooch Blue Glass Cabochon silver tone Add a touch of the whimsy wearing this charming Cat brooch in Blue Glass and silver tone by the BSK Jewelry Company. This well made brooch is made of silver tone metal and a large Blue Glass Cabochon stone. Lovely attention to detail. This vintage piece measures 1 1/2" x 1 1/4". Signed B.S.K. on the back. Vintage 1960s. Slightest mark on one side (right as it faces you) of glass cabuchon, see pic, really have to use a magnifier to see. ! This fun and fanciful Kitty Cat pin is a rare and beautiful add to a collection!