One of the best elements for distinguishing
meteorites fromEarthe rocks is Cr. Nearly all stony meteorites
have high concentrations of Cr compared to most Earth rocks.
The most Cr-poor meteorites are the feldspathic lunar meteorites,
which have high concentrations of Al2O3
and CaO. Cr-rich terrestrial rocks tend to be ultramafic
rocks like dunites, peridotites, pyroxenites, and serpentinites.
Caveats, and References