The history of Liberty & Co Art Nouveau jewellery is outlined in a number of books, with particular focus on their principal designer, Archibald Knox. Lots of good information is also available on-line, including Dr Stephen Martin's essay here: http://www.drstephenmartin.com/pdf/Knox_Jewelry.pdf - Another great resource is the jewellery section at: http://www.archibaldknoxsociety.com - IMHO the pieces illustrated below are all designed by Knox.