I personaly think its a nice idea, well unless you are a little clumsy and lose it,
But really... i think that its a sweet idea, Anything that makes us feel close or that we wont forget the person is a good thing,
I personal have ashes of family ..and there stuck in my wardrobe, to have them made in to a ring would be far nicer, than stuck under my tops,
Sounds morbid i know, lol, But any idea is worth thinking about,
See i would not mind being turned in to a shoe, But thats another story.....