This is a vintage amber-colored translucent resin (Lucite) double cat brooch. Design style: This type of cat-shaped resin or plastic brooch is common in vintage jewelry from the 1960s and 1970s, known for its warm, translucent texture. Details: The brooch depicts two cats side-by-side in an affectionate pose, adorned with a dark brown, three-dimensional cat knot as a bow tie.