Art Nouveau/Art Deco 800 Silver Cameo Brooch/Pin w/ Filigree and C-Clasp

Description

This Art Nouveau/Art Deco cameo brooch/pin was brought over from England.  Its style borders the two periods - Art Nouveau, where leafy tendrils in the 800 silver filigree overlap geometric figures so loved in the Art Deco period.  The brooch measures 1 3/4" long and 1 1/8" from top to bottom.  The cameo appears to be carved stone or possibly a very light Sardonyx Shell.  I am leaning towards stone because the back appears uncurved and is a light grayish/cream color, which I read Sardonyx Shell can run to.
The cameo has a little leeway of movement inside the looped bezel, and I recommend having a jeweler tighten the bezel.  It is a simple procedure, but a jeweler has the right tools and knows how much pressure can be put on their tools and the bezel.  The back is a C-Clasp closure, which is still tight.  The straight pin has a small ripple in it, commensurate with this pin's age.