Large Art Deco Silver Marquisette shell cameo brooch/pendent

Beautiful unique art deco silver carved shell cameo with marquisettes. The shell background is a rich dark peach / orange and highly glossy. Unmarked silver frame with 21 faceted marquisette embellishments. The frame also has a fold down bail at the back which makes it a pendent as well. There is no chip or crack or stress lines to the shell. Clasp and loop in good condition. Measures of 1 3/4” x 1 3/8” or 4.5cm x 3.5cm (not including bail)