Antique Victorian Brooch C Clasp Stunning Setting Unique Antique

Authentic Victorian Jewelry Exquisite detailed setting (Please zoom to see unique details) I believe faceted center piece is glass? Old half C clasp I have hung on to this piece for decades and it is time to find a new home. Condition: used antique in excellent condition for age. PLEASE NOTE THAT CLASP IS LOOSE BUT SECURES WHEN ON GARMENT. Please zoom in on all the photos and see details.