An Edwardian diamond foliate and scroll pendant brooch

An Edwardian diamond foliate and scroll pendant brooch, the pierced design set overall with graduated old circular-cut diamonds in platinum, the central diamond weighs approximately 0.80cts, approximate total diamond weight 3.70cts, suspending an untested pearl, on fine-link platinum neck chain set with six diamonds. the pendant fitting detaches to be replaced with a brooch fitting, 5.8cm wide, chain 39cm long