I would say this is a Austro Hungarian bohemian garnet brooch from around 1860s to 1880s. This beautiful brooch comes in a top quality new vintage styled presentation box.
Early Victorian Gemstone: Bohemian Garnets Metal: Tests as low grade gold Fasting: C catch metal pin Diameter: 3.8cm 1.1mm deep Weight: 8.8g Comes with the new presentation box Condition: Very good for its age, Some wear and scratching consistent with age and use.