Lucky Shamrock Necklace in silver Shamrocks are associated with Good Luck and St. Patrick. Includes an 18″ long silver chain. This Lucky Shamrock pendant comes on an 18″ long chain. The shamrock is a beloved symbol of Ireland that is immediately recognizable to almost everyone. The traditional Irish Shamrock is a three-leafed white clover – not the lucky four-leaf clover that many people think of – and is thought to have been used by St. Patrick himself to explain the idea of the Christian Holy Trinity to the ancient Celts. It is also the Irish symbol that many people associate with St. Patrick’s Day.