Silvertone Small Best Friend Heart with Clear Crystal Green Shamrock Necklace and Clover Earrings Jewelry Set. Best Friend Heart is approximately 0.57 x 0.53 x 0.12 inches (HxWxD) not including loop. Word is antiqued on the front with an AB crystal. Back has an antiqued flower. 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.