The journal Geochimica et Cosmochimica Acta suffers from being overextended. After all, its domain is from underground, to interstellar space, and back to pre-Solar Nebula/stellar nucleogenesis. But that doesn’t mean stay away, it means pick and choose the small-body-worthy content. This April, vol. 371:
Aléon-Toppani, A. Brunetto, R. Dionnet, Z. et al. Correlated IR-SEM-TEM studies of three different grains from Ryugu: From the initial material to post-accretional processes p.1
The three grains returned and studied contain phyllosilicates, of course, and unaltered mafics of course, and miscellaneous meteorite-like components of course… and comet-like components, by comparison to carbonaceous micrometeorites and the Stardust samples. That’s right, Ryugu has- in part- a comet nature.