Grapevine Mesa stones have a rusty exterior with some remaining
patches of fusion crust. Slices made from Grapevine Mesa show rounded to
angular silicate inclusions accompanied by rounded to anhedral metal
grains. The metal of Grapevine Mesa closely resembles the meteorite
Bencubbin. Grapevine Mesa has been placed in the subgroup A (CBa) of the
Bencubbin-like Carbonaceous Chondrites. Bencubbin-like Carbonaceous
Chondrites are very expensive and these small fragments make this rare
classification of meteorite much more affordable.