Vintage Sterling Orchid Brooch/ Pin w/red Accent

Attention all vintage brooch collectors! This is an estate sale find that I could not pass up. 16 grams of vintage sterling silver. Overlay is copper/rose gold in color - not sure if that is a sterling coating or something else. As you can see in the photos, the overlay is wearing in some areas and the brooch needs to be cleaned. It is engraved/etched and has a red glass or crystal accent in the center. Looks like it’s fashioned in the shape of an orchid. Please see all photos. Gram weight: 16