A Rock or????

[Star_One]

Hi All

I was wonderng, anyone have any explanations as to what this could be, UFO Magazine said it could be a rock speaker, Surely if someone did some tests on it they could figure it out????
http://www.tsc-global.com/petradox.htm

 

[Votorx]

Looks like a man made thing to me. What strikes me as weird is the fact that the photos show different rocks. The top left and the bottom left look the same but it's obvious that the top right and the top left are completely different. Someone could have easily made it. chip off a few pieces of the rock and put melted metal into the dent. I don't see anything unusual here.