Very Small Celtic Cross Necklace - Sterling SilverVery Small Celtic Cross Necklace Sterling Silver Thorleif's Cross Handmade in Ireland and hallmarked in Dublin Castle. Stone versions of this symbol were first erected across the Celtic region as early as the 9th century (during the Viking age). Today the Celtic Cross symbol has become well known as a symbol of Irish heritage. Materials: 925 Sterling Silver. Approx. Size: 0. 87" (22mm) in height x 0. 4" (10mm) in width.