ANALYSIS: Israeli Meteorite Misadventures
And then there's the meteorite fragments themselves. 628 fragments were collected from a large 10 kilometer-wide rice field fall zone, of which only three were positively identified by the team as originating from space. One sample is shown here.
But there's a problem... that doesn't look like a meteorite. It's kinda porous. And jagged-looking. It's crumbling a bit, too.
Usually meteorites are dense, smooth, dark rocks with a tell-tail fusion crust. Even fragments from a parent fireball don't look like that. But it's OK! They measured the oxygen isotopes contained within the samples to confirm "unequivocally" the ratios match that of known space rocks.
Sadly, as Bad Astronomer Phil Plait points out, there's no mention on how the team avoided carbonate contamination of the sample - contamination that can throw oxygen isotope measurements. "But even if they had (carried out the correct procedure), the non-standard oxygen isotope ratio is not proof of extraterrestriality, it just isn't necessarily inconsistent with it. So really, their claim that the isotope ratio proves ‘unequivocally' these are meteorites is wrong, plain and simple." So there's every chance that either the rocks are meteorites (but they were contaminated) or they are, you know, rocks. As in rocky rocks; rocks that came from the ground (on Earth).