Gorgonstone

"I don't care what it does to them, we're not naming it Kryptonite."

- Unknown

Details
Gorgonstone is an extremely rare Gem Stone, mostly found buried in Radioactive Wastes. it gained it's name due to it's effect on Miracle Core users - upon contact with the Stone their entire body locks up and they become unable to use their abilities, or in some cases even speak and move.