This is signed Carnegie without the copyright symbol. That dates it to before 1956 when Hattie Carnegie, one of the most famous jewelry designers of the 20th century, was still alive.
It measures 1 6/8".
There is some yellowing to the white enamel.
1 of the petals is bent down (pic 4). I do not know if it was made that way or a previous owner bent it, but the petal is still solid and firm and does not move.
I have more Hattie Carnegie brooches, earrings and a necklace and other designer jewelry in my shop:
I ship worldwide. Except to INDIA.
I have more vintage & antique items in my shop:
For most items in my shop I ship worldwide!