Shoot, I have some rocks that your brother would probably love...coated glass-like rocks from Beirut, pieces of rock sarcophagus from Tyre, pure salt rocks from the Dead Sea, layered sandstone rocks from Petra, a plain old rock swiped from Oskar Schindler's grave in Jerusalem (to name a few). Unfortunately, I'm not willing to give them up, but if you are still interested, I can pick up some extra rocks the next time I take a trip to any of these locations. Shipping costs from the Middle East might be a bugger, though.