I've never seen anything like this brooch. The hummingbird and flower are rendered in a myriad of colors of glass mosaic. The tesserae are very thin - like that of fine antique micromosaics - but also long which gives the piece a modern feel. Which raises the question of dating: since I have never seen micromosaic work like this I can't really date it accurately, but it has a modern feel and my guess is that is comes out of the studio jewelry movement of the 70's or 80's.
The brooch is unsigned but clearly made by someone with a great deal of talent. It tests as 800 silver. It is 1-1/2" x 1-1/2".
This would be a great piece for someone who collect micromosaic jewelry since it is rare to find modern pieces that hold up next to the fine antique ones.
Vintage and Antique Jewelry and Accessories Selected with an Architect's Eye
I'll be selling at the Modernism Show in Palm Springs from February 12-15, booth 501A. Stop by and visit if you are in town.