Allan kindly explained: > From the data in that abstract, I'd be very cautious > 45% anorthite, but only 3.7% Al2O3 > 26.15% SiO2, 5.38% MnO, CaO 39.6% > If it is lunar, its like nothing else. This seems to be a *little* more consistent with a potential classification of that stone as a CM or CK chondrite, ... ?? Bernd