Cameos were all the rage and still are--this little mini masterpiece carved from shell depicts the bust of a woman with flowing hair.  Under 10 power magnification the cameo shows no damage or repair.  The cameo is set in a 14 karat yellow gold oval filigree frame with a hidden swivel hook so it may be worn as a pendant.  The pin/pendant measures approximately 1-3/4 inches in length and 1-1/2 inches in width.  On the back of the cameo there appears to be a "signature" a letter "G" and "B" in script.  Circa: Late Edwardian