Celebrate all that is Irish with the Shamrock Address Plaque. This very magical address plaque contains a whole field of Shamrocks. Not to be confused with the common four-leaf clover, Shamrock refers to the sprigs of young clover, or trefoil and is the national symbol of Ireland. The green painted shamrocks are optional and a little extra green for the bling. giggle...get it green shamrocks - money is green...cost a little more. Green bling - I crack myself up. Okay, I was just told if you have to explain the joke it isn't funny. But I am laughing.