Whats a small thing(about 1in big) that i can make to leave in purse to remind me about the true beauty i have

see, im teaching a bible study on what it means to be truly beautiful, so i want to give all the girls im teaching a knick knack they can put in thier purse so whenever they swee it theyll have that reminder that they are truly beautiful. Any ideas? (sybolism is good also.)