I guess the best shape for the love gift is a heart shape. It's so traditional and ordinary. I offer you very interesting place to have a date. You and your girlfriend can go to the smithy. Ask the smith to show you all the process and forge an iron heart for your girlfriend. I hope she will be happy to see you as a strong man near with anvil! And you will present her the best and the strongest heart in the world! What about my idea?