Matisse Renoir signed Copper and Enamel Stylized Leaf Lily brooch. A similar pin is pictured on pages 104 and 115 in Copper Jewelry Art: A Different Lustre by Berkholz and Kaplan.
The pin is 3 1/4 inches long and 1 1/2 inches wide. One half of the leaf is copper with the black shading under the applied scroll. The other half is coated with the Matisse trademark colored enamel in shades of blue. Raised areas resemble droplets of water. Excellent condition