Pandora April Birthstone Stud Earrings In Sterling Sillver And Rock Crystal Popular Wholesale, Pandora USA Online Outlet Store, Welcome To Visit And Shopping Anytime! Celebrate an April birthday with these beautiful colourless rock crystal birthstone studs, made from sterling silver. In ancient times, rock crystal was thought to be solidified water or ice. Because of its appearance fortune-tellers used rock crystal or crystal balls to disclose the future of their clients. May your future be nothing but bright!