Sterling silver Dorset ammonite with topaz

I have cast this beautiful, Dorset ammonite using a traditional sand casting method in solid sterling silver. I have given it a polished finish and set a beautiful topaz cabochon gemstone. 
It measures approximately 9mm in diameter and hangs off a 45cm sterling silver rope style chain. The topaz is 3mm
It comes beautifully presented in a glass bottle making a special gift and will be dispatched within 1-3 working days via Royal Mail Signed for delivery.