I obtained it from an estate sale I was doing for a friend.
I remember sale so vividly, and we had TONS of Beautifully Glitzy Vintage Costume Jewelry at the sale, but then it was not my cuppa tea. I remember the women shoppers rushing to that display table full of shimmering aurora borealis and rhinestones.
If I had the costume jewelry bug back then, my collection would be significantly larger. I would have bought it all up before the sale began!
Micromosaic jewelry is like a painting done in glass. The smaller the glass, typically, the older the piece.
The brooch measures is about 2" in diameter