18th Birthday Gifts: Help her celebrate a milestone birthday with this simple, elegant and fun gift. When she wears this beautiful necklace, she will have a reminder that your admiration for her is infinite. The perfect sparkly pendant to commemorate 18 years in the life of a brand new young women. A sentimental gift for girl, be it sister, daughter,granddaughter, or niece. She will love the dainty necklace and will cherish it for years to come.