Mazel tov, you crazy kids! 
I refuse anything to do with natural diamonds, though I would consider a lab created diamond. [but then again, I also don’t wear rings, I use crutches and I find rings and crutches very uncomfortable, and forget rings and my wheelchair.]
I am rather fond of tanzanite though. I have a lovely tiny frog set with a small cab of tanzanite =)
Diamonds? Sapphires? Tanzanite? Pfft, unless you can produce a bona-fide philosopher’s stone you’re no better than scum in my book.
I’m not sure it’s legal to marry a zombie.