Drilling a bit deep this month. In the 15 Nov issue of Geochimica et Cosmochimica Acta (vol. 385):
Mahlé, T. Marrocchi, Y. Neukampf, J. et al. The last generation of nebular chondrules possibly sampled in the CH/CB chondrite Isheyevo p 74 .08.027
Han, J. Nagashima, K. Park, C. et al. Grossite-bearing refractory inclusions from reduced CV chondrites: Mineralogical and oxygen isotopic constraints on the parent body alteration history p 100 .09.001
Yes, it’s good to have samples in hand. With actual material, we can use our most powerful instruments, and focus on the tiniest particles of that sample. Really- we can study as few as several thousand atoms/molecules of samples, such as presolar grains. In these two GCA papers, the authors take small samples- under or about a millimeter in diameter for Mahlé et al, and a fraction of that for Han et al. Using these, our top labs and instruments can take studies out to surprising decimal places. The result? Indications (make of that what you will) on the histories of these meteorites, and by implication (again, you can decide for yourself how conclusive this is) histories of the Solar System.
These carbonaceous chondrite meteorites formed in the middle/outer Solar System, where their chemistries were frozen in, pretty quickly as the Solar System goes. In the wide, cold outer Solar System, they were well-preserved for the most part (maybe the CB chondrites, not so much). Pretty amazing that we can ‘read’ what happened, billions of years ago, with these meteorites as our history books. If you’re willing to learn the ‘language’ of these records, and read diligently, that is.