The influence for the brooch and pin designs undoubtedly comes from Pictish symbol stones and elaborate metalwork and jewellery, dating from around the 5th - 8th Century. The Picts used a wide variety of symbols from abstract designs and animals to more recognisable serpent, fish and bird forms. Indeed there are many similarities to designs found in the illuminated manuscript, the Book of Kells, thought to have been started by Iona monks around the 8th century. Many of the Ritchies' brooch styles clearly show these influences to the extent that some of the pieces, such as the penannular brooches, have used the same type of fastening and design as would have been used by the Picts themselves.

The following brooches and pins have been cast in Sterling Silver from the original Ritchie pieces and are hand finished in the style of the originals. Each item is hallmarked by the Edinburgh Assay Office and carries the mark MK IONA.