Love the shapes together
How to Make Vintage Style Jewelry Tutorials
From the pages of Belle Armoire Jewelry Spring 2014 -- I really like the idea of enamel on patterned metal, both opaque (hiding the pattern) and transparent colours (letting the pattern show through).
Copper Enamel Jewelry
Textures at Home [Enameled copper.]
Copper and Enamel Turquoise Earrings. $25.00, via Etsy.