I made this for a friend, who's fiance had purchased a Tiffany Heart Key necklace for her on her birthday. He asked me to make something that would match the theme. Sooo...to make it easy I just did a 2 layer 8 in square cake and covered in homemade marshmallow fondant tinted light blue and made the bow, rose, and Heart Key out of fondant and painted the Heart Key with silver pearl dust.