From Pat Fish
Regarding the photos of stones in Brazil on Rense.com:
Identical stones were once commonly found all over the Channel Islands, and I have a dozen in my possession that I bought from an old fisherman who picked them up on San Nicholas in the 1930's. They look pretty much identical. He told me the Chumash indians thought of them as good luck stones, and he thought they were droplets of volcanic lava that had swirled into stones as they hit the sea.
Whatever they are the resemblance to these stones that accompanied the abduction in Brazil is exact. I bet the Natural History Museum has a lot of them.