Tara Brooch Connemara Marble Celtic Jewelry From Ireland. Get this Connemara marble Tara brooch and display your Irish heritage for everyone to see! This brooch features unique Connemara Marble and lovely Celtic weaves. The Tara brooch is a Celtic brooch of around 700 AD and considered to be the most impressive of over 50 brooches to have been discovered! This Celtic brooch features Connemara Marble. Connemara marble is a stone that is solely found in Ireland making it one of a kind....