Macroscopic Description: Kathleen McBride
50% of the exteriors has shiny to glassy patches of black fusion crust. The exposed interior is rusty yellow in color and has fractures in a sort of plate-like orientation. The interior has small areas of gray crystalline material. It is a rusty to yellow-ocher color and very weathered.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach, Glenn MacPherson and Lauren LaCroix
The sections exhibit a granoblastic texture dominated by sodic plagioclase (>70 vol. % in the section studied) with lesser olivine and two pyroxenes, although mafic-rich pockets reaching several mm in size are present. Grain size is very heterogeneous; in one large feldspathic region the crystals are up to 5 mm, but elsewhere are rarely as large as 1 mm, perhaps suggesting formation as a breccia. Minor opaques include ilmenite (1.6% MgO), troilite, Fe,Ni-sulfide (pentlandite; 26% Ni), spinel (13% TiO₂, 35% Cr₂O₃, 3% Al₂O₃), and Ni-Fe metal (67% Ni) that occurs only as minute inclusions inside of olivine. Silicates are equilibrated with olivine of Fa₅₉, orthopyroxene of Fs₄₄Wo₂ (Fe/Mn~43), clinopyroxene of Fs₁₉Wo₄₃ (Fe/Mn~30-45) and oligoclase (An₁₄Or₂). The combination of its variable grain size, locally granoblastic texture, iron-rich mafics and sodium-rich plagioclase is unlike any known achondrite, including those of planetary origin.

Oxygen isotopic analysis: Z. Sharp, University of New Mexico
Oxygen isotopic analyses of three small (2-5 mg) pieces of GRA 06129 yielded the following results which fall in the Earth, Moon and enstatite meteorite field:

Thin Section Images

Plane-Polarized Light GRA06129	Cross Polarized Light GRA06129

Lab Images