Amazing! Hammer stones are meteorites that have hit man-made objects, which increases their value.
Awhile back, in the 90’s, a family in suburban Seattle had what they thought was a meteorite crash through their roof and land in their living room. It was green and started melting before authorities could arrive. Turns out it was a backed up toilet, leaking sewage on the outside of an airliner descending into Seattle-Tacoma International Airport. As the mass warmed up, it started to emit a foul smell. These folks thought they had a hammer-stone meteorite, but actually had a chunk of frozen, jetliner, toilet water. But hey, we are still talking about them!
Shadybrook 