NWA 18062 (3.17 gram)

Classification: Ungrouped primitive achondrite, S-low, W-moderate
Place/Time: 2025 in Western Sahara
Mass: 1870g

History: The meteorite was purchased from a dealer in Western Sahara.
Physical characteristics: Dark brownish rock lacking fusion crust.
Petrography: The meteorite shows a poikiloblastic texture of up to 2 mm sized enstatite and forsterite grains with less abundant Ca-rich pyroxene. Small rounded pyroxene grains are often found poikilitically enclosed in enstatite. Opaque phases are kamacite, troilite, daubréelite, schreibersite, and their respective alteration products. No feldspar detected.
Geochemistry: olivine: Fa_0.12±0.04 (Fa_0.1-0.2, FeO/MnO=0-1, n=6); low-Ca pyroxene: Fs_1.0±0.1Wo_1.0±0.04 (Fs_0.9-1.1Wo_1.0-1.1, FeO/MnO=2, n=6); Ca-pyroxene: Fs_0.6±0.1Wo_42.5±0.1 (Fs_0.5-0.6Wo_42.3-42.7, FeO/MnO=1-2, n=6)
Classification: Ungrouped primitive achondrite. The olivine composition (Fa_0.1) is significantly different from the olivine composition of other primitive achondrites like Bir Ounane 001, Bir Ounane 003, NWA 15061, NWA 16639, NWA 17131, NWA 17483 that have Fa_~1.2.

NOTE: Full slice one side polished. Thickness can vary from 2.0 to 1.5 mm.