Silvertone Small Rose Outline Green Shamrock Necklace and Clover Earrings Jewelry Set. Small Rose Outline is approximately 0.46 x 0.54 x 0.06 inches (HxWxD). Same on both sides. Silver tone faceted ball chain necklace is 18 inches long with a spring ring clasp. Green Crystal Post Earrings have a steel post and a plastic comfort ear nut. Sweet green Irish Shamrock is hand painted enamel and is a famous symbol of Ireland and St. Patrick s Day. The symbol was used be St. Patrick to spread Christianity as a symbol of the Holy Trinity.