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!
Just try to make sure he doesn't eat the ring. Then we'll have to wait for him to spit up a pellet and then dig it outta there. Ew.
For those of you who want the karat count in your diamond to match your maturity level.
Honestly, if you're even considering this kind of thing... you've got issues.
And nary a portal shall ever separate them.