Well, I can see red in and a tinge of green in sponge looking rock. Iron= red, and the green-blue = copper sulfide. Do you mean they attract metal like a magnet, or a magnet will stick to them? Also in what locality did you find the specimens?
the first one will stick to a magnet , the second one doesn't stick but your feel it is a bit magnetic when you get it close to a magnet .Found them years ago I dont remember where I found them.