NWA 8703 Diogenite
Tkw 461 g, find 2014
Classified by Dr. Anthony Irving, Washington University
Northwest Africa 8703 (NWA 8703), Classification: HED achondrite (Diogenite)
History: Purchased by Stefan Ralew in July 2014 from a dealer in Foum El Hisn, Morocco.
Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular grains of orthopyroxene (up to 5.1 mm, with inclusions of chromite) in a matrix dominated by orthopyroxene with accessory clinopyroxene, chromite, troilite and rare Ni-free metal (stained).
Geochemistry: Orthopyroxene (Fs28.4-28.7Wo3.6-3.9, FeO/MnO = 29, N = 3), clinopyroxene (Fs11.3-12.0Wo44.6-42.4, FeO/MnO = 20-24, N = 2).
Very nice and carefully prepared slices at only $19 / g.