Thy Are From Out Of Our World,

but you too can own one,

 if you go to Christie's auction house in London, where a meteorite auction is to be held, micrometeorites are common, and the particles, which usually range in size from a grain of sand to a grain of rice, constantly bombard earth, they even show up in our rain gutters, but big meteorites are very rare, with only about 38,000 collected by humans so far, the impressive collection at Christie's is expected to go for over 3.8 million dollars, the one pictured above, yours for an estimated £300,000,

 or this one, a piece of Mars that was chipped off the planet and sent spinning towards Earth, as these meteorites are rare, it is expected to sell for more than £450,000,

or this one, lot 35 in the catalog a polished sphere yours for just £7-10,000, if you take the time to download the PDF catalogue I think that you like myself will be amazed at the different rocks that fall to earth.