This is a tiny brass journal, aka booklace. It's art to wear.
The cover has been etched with a stylized A. When etching metal, you can use staz-on ink and rubber stamps, then immerse the metal in etchant solution. The parts that are not stamped are etched away and a relief is created.
The back piece is verdigris patina.
This is a brooch that I attached a brass heart to. The heart is 3D; fiber is pulled thru the rectangle and secured with a brass bar. The main image is of roses mounted on a postal cancellation from Avignon, France. This image is attached to the back of a large flat-backed marble and placed behind the domed opening.
The back is embossed copper that has been patinated.
I adored Avignon when we visited. As a very small hamlet, it is easily traversed. Avignon charmed me. This piece is in memory of our stay there.