Vintage handmade multi-color metallic foil/plastic Art Brooch signed by artist

Vintage handmade Art Brooch made of fused plastic pieces coated in metallic foil in multiple colors. 1-1/2" x 2". Lightweight. Signed by artist looks like "Jay" or "Joy". Foil is colorful and shiny. Some edges are rough cut and appears that is how artist intended. Pin back was moved from off center to center position. Pin back works well. Please see photos for condition.