Katie took the data from when I proposed and created our wedding rings. On the outside is her Galvanic Skin Response. She was sitting around 400 or so and then I popped the question and she got really nervous and it dropped to around 200. On the inside shows her brainwaves that cut out shortly after she said yes. Coincidence?
We had the rings printed at Shapeways. Hers is polished silver and mine is in steel.