Help! Is this old broche worth something?

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So we’ve got this broche for years now cause we got it from my mother’s grandma. She died not long after and we never really found out what this broche is called, what it’s worth and we never knew if it’s actually diamond in the middle. My mother’s grandma has been through world war 2 and it’s definitely from that time. We can’t find anything online about this broche tho and we would love to find out what it’s worth. We are definitely sure that we won’t sell it, we just really wanna know more about it.
what’s also really strange, is that the (Possible) diamond in the middle doesn’t damage. No scratches or anything at all on the diamond. The golden looking part is damaged tho and some small crystals are missing.