Using the oxygen isotopic composition, meteoric iron composition and silicate composition pallasites are divided into 4 subgroups:
Main group pallasites (PMG): Almost all pallasites
Eagle Station group (PES): 5 specimens known.
They are related to IIF irons.

Pyroxene Pallasite grouplet (PPX): Counts only Vermillion and Yamato 8451.
They take their name from the high orthopyroxene content (about 5%).
Metal matrix shows a fine octahedrite Widmanstätten pattern.

Pallasite ungrouped (P-ung): Specimens that don't fit into any groups or grouplets
Using the oxygen isotopic composition, meteoric iron composition and silicate composition pallasites are divided into 4 subgroups:
Main group pallasites (PMG): Almost all pallasites
Eagle Station group (PES): 5 specimens known. They are related to IIF irons.
Pyroxene Pallasite grouplet (PPX): Counts only Vermillion and Yamato 8451. They take their name from the high orthopyroxene content (about 5%). Metal matrix shows a fine octahedrite Widmanstätten pattern.
Pallasite ungrouped (P-ung): Specimens that don't fit into any groups or grouplets
Pallasite