If stone is breakable then why is a stone hearted person less likely to take emotional damage.
Does this mean that someone with a stone heart will only be hurt more when something gets though to them.

It would be nearly impossible to have a cold, frozen heart unless you were dead, because wouldn't your body heat warm your heart and thaw it out.

I personally would prefer a paper heart, although they are the most likely to burn and your blood would most likely saturate it, which I guess would stop it from burning so that's good. A paper heart would probably be easily broken as paper is easily torn, but I guess you could do origami with it, but then I guess you'd die because you wouldn't have a heart.

So I guess that maybe a flesh heart is the best. ( **** I was really hoping that origami heart idea would catch on, like adding the word hogs onto the end of other words to make them sound cooler, all the cool kids are doing it-hogs, or so I'm telling myself)