After being married for a few years my wife began hinting that she was looking for an upgrade of her .5 karat diamond ring. Being young and of limited funds the next time she asked for her "One Karat" ring, a plan began to formulate in my mind..... Muhahaha.
I checked my wife's ring size and found it to be about the size of my pinkie finger. I checked the fridge and found a few large carrots in the crisper. I removed one and found it of appropriate size for what I needed.
I took the carrot over to the chopping block and trimmed off the end once the end was trimmed I cut a large section about 1 1/2 inches wide. I marked where I wanted to cut the carrot and cored out the center leaving the sides about 3/4 of an inch thick.
I preheated my counter top toaster oven to about 275 degrees and then put the carrot in. Anyone who has ever eaten a Maruchen Cup-O-Noodles can attest to the texture of freeze dried carrots so I figured the carrot slice would attain the same leathery consistency.
You have to check it regularly. Make sure the ring is drying and not cooking. After about an hour or so I thought mine was ready. I took it out and sized it to my finger an found it the perfect size. At this time the ring was still pretty thick but very leathery. My wife actually wore it for about a week before taking it off and leaving it in the car. After wearing it and leaving it in the car the rings outer size continued to reduce and it became very hard.
This was a fun prank to pull on my wife and if your wife starts asking about that "One Karat Ring" give this one a try it's even better if you put it into a ring box. Good luck and have fun.