Antique 1910s Oblong Abalone Shell Silver Brooch Pin

Gorgeous late Edwardian or teens-era sterling silver brooch made of iridescent abalone shell in an elongated oval/ oblong shape. C-clasp closure. 

Materials: Sterling silver, German silver, genuine abalone shell.

Measurement:

4.5cm long

Condition: The silver is tarnished. The shell has a rougher middle section which feels like it could be cracked. However, this might be a natural shell imperfection.