NWA 2871, Northwest Africa
Found 2004/2005
Primitive achondrite, Lodranite, 4.6g
This was originally classified as an acapulcoite (and still is by the Meteoritical Bulletin Database). Both acapulcoites and lodranites come from the same parent body and are chemically and isotopically indistinguishable. Their only difference is in their average crystal grain size; acapulcoites less than 0.3mm and lodranites greater than 0.45mm. This stone has an average grain size of 0.6 to 0.7mm. The researchers who originally classified this rare stone mistakenly thought that the lodranite cutoff was 0.75mm when they submitted the original classification paper work on this meteorite.