Italian Micro-mosaic Brooch (1970s)

This nice micro-mosaic brooch was likely made in Murano, Italy, and it's certainly a vintage piece. Unfortunately, it has bronze disease, meaning the metal is liable to decompose no matter what! It'll be going back to the thrift store.
Here's some info on bronze disease:
en.wikipedia.o...
Here's some general info on micro-mosaic jewelry:
jewellerymuse....
My Ebay store:
www.ebay.com/u...
My Etsy store:
www.etsy.com/c...