Vintage Red Garnet Brooch Jewelry

Ruby Red Garnet Glass Gem Vintage Brooch Jewelry. I have not found a mark. But this is a delightful brilliant Red. The gilding has flaked off the back. See 6th picture...one tiny red gem is missing and 2 small fractures in 2 larger gems. I wish I had more history about this diamond in the rough. INFO WELCOME. I am not a jeweler. Description based on markings and rings excellent workmanship. I make no guarantees as to the item's composition. Size is approximate