Can anyone tell me anything about this necklace

This was my great aunts. She got this quite some time ago but I’m not sure where. It has been passed down to me and I know very little about it except that it is a squash blossom. It is on the smaller side, fits like a choker. It has hand engraved initials on back and it also has the word “set” engraved. Does anyone know anything about this beautiful squash blossom? Any info is greatly appreciated.