I believe it was originally two bars of five diamonds each as in this portrait.
Queen Alexandra wore the brooch. Queen Mary wore a 14 diamond bar brooch and the Queen wore that one for many years while Queen Elizabeth (QM) wore Queen Victoria's 10 diamond brooch as her shoulder sash brooch. In recent years the Queen has worn Queen Victoria's 10 diamond bar brooch.
--Previous Message-- : These are links to portraits and was wondering : what happened to the brooches they are : wearing? : : Queen Alexandra : Queen Victoria 1897 : Queen Victoria, 1890 : :