On this site I have read an idea "Love Stone" by teksis. I like it very much. So, I want to offer my own idea.

I offer you to make a love locket on your own for your beloved one. I did it for my girlfriend and she likes my handmade a love locket a lot.

Instructions:
You will need a plastic packet, cap-crown and matches. It would be better if you make the locket in the open air. Otherwise you will have a lot of smoke at your home. Set fire to a plastic packet. When it starts to melt, let it drop into the cap-crown. When the cap-crown is filled with melted plastic, let it get cold. Then take a locket from the cap-crown, write words of love there and make a hole for a chain in the locket. Give this handmade love locket to your beloved one.
I am sure she will like it!!!