Silvertone My Angel Envelope Green Shamrock Necklace and Clover Earrings Jewelry Set. Silvertone My Angel Envelope Charm is approx. 0.75 x 0.66 x 0.14 inches (HxWxD) not including loop. Charm has a clear crystal and My Angel on the front and a heart seal on the back. 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.