Huge Old Vintage Italian Ornate Shell Cameo Brooch Pendant Italian 1820 circa. Gold or GF

This cameo brooch measures is 55mm x 50mm. Weight is 17.21 gr. , and set in a twisted style gold or gold filled bezel. The shell is free from any breaks, cracks, or chips, and has some gorgeous coloring. The detail is very crisp and sharp and the lady is quite striking. Created in the beginning of XIX century - original, vintage piece. Not sure about metal. Pin is not original. Loose a little bit. Except this cameo in very good condition (specially according to age.)