Material: The ring is made of acrylic, lightweight, comfortable to wear. Perfect Gift: It is a perfect gift for girlfriends, families, friends on graduation, birthday, Mother's Day, Christmas, Valentine's Day, Anniversary, and other special days. FROGS. The frog is a good luck symbol for many cultures that depend on rain for rich and bountiful crops. To these folks, a frog can be a sign of prosperous weather to come. Frogs are also considered lucky by a variety of others, who see the amphibian as a symbol of fertility, transformation, and safe travel.