Vintage Matisse Renoir Sign Green Enamel Cooper Reflective Cooper Leaf Brooch

Signed "MATISSE RENOIR" Green and gold color enamel encased in glass. Reflective Cooper leaf. 2 large overlaid with contrasting bright reflective leaf. Measures 3" long, 2" wide. This estate find of a brooch pin is missing and a Cooper chain necklace has been attached. Originally was a brooch and was changed to necklace before I bought at a estate sale Necklace measures 15" long. Such a beautiful work of art. Hook and eye clasp.