There is a scam going on among Jihadists. It’s a fake material called Red Mercury, yes liquid mercury with a red tinge, and it is supposed to make a typical explosive device a super powerful nuclear device. It is a fake. There is no such thing as unstable red mercury. Although it was probably copied from Red Matter out of Star Trek.
People are dying to find this stuff, even opening up mines and dying trying to extract this it according to street legend.