Vintage pink petal floral gold leaf pin brooch

Vintage brooch with pretty acrylic type pink flowers- the petals are semi translucent and glass type pink center stones, beautiful gold leaf shape stem. One stone is missing. There is also a “rough” area on the edge of the top flower, see photographs, as well and I’m not sure of that signifies there was something else once attached or what. Overall it looks to be in good condition but is sold as is. I have a friend who has a metal tester and he said he believes the gold is 10k gold, but I’m not positive.