I think all icons are miracle-working. For an icon to be healing one needs to understand that it is Faith that makes it miraculous for the one who prays looking at it. So, it is Faith that heals.

Watching the videos on miraculous icons, I'm asking myself a question. How do icons become healing? What should any icon be like to become miraculous? Thousands of icons have been painted fro ages of the Orthodox Church's existance, but only dozens of them become miraclous. On of the possible reasons can be some conditions in which any particular icon was painted. It can be some war or some other great tragedy. One more reason is the divine artist (if we can say so). It's not a secret that there are absolute genius among artists. So why can't they be influenced by God? And in this case it's natural that their icons are miraculous. Or can we say that healing icons are influenced and vitilized by God Himself? And in this case there's no matter who the artist is and what the conditions are. The only thing that matters is only God's Will.