It'll probably involve his cat Mjolnir or his pet Coastal Rosy Boa to be honest which is perfectly fine with me. Although Mjolnir likes to wander around so that might be a bad idea so he'll probably put the ring in Sneak's(the aforementioned Rosy Boa) enclosure and ask if something seems off.
However I have told him that he doesn't need to spend thousands of dollars on ring, and this was just a discussion about regular jewelry, in order to "prove" he really loves me. His first gift to me was a $3 horse plushy and I was incredibly flattered.