Check out these wedding bands by Sakurako Shimizu. They are molded into a waveform representation of your partner's voice recorded saying "I do," or any phrase you choose. A very cool and unorthodox idea!
What do you mean you don't have five million to drop on a shiny bauble?! Your love is obviously not as deep as Jay-Z and Beyonce's.
This proposal comes background check-ready! In case you're just not quite sure yet.