I don't have much any of the back story on this great Eucrite so I used the write up on the Meteoritical Society site.   The thin section (Polished!) was a loan from Jeff Hodges.  This set of images was taken at a magnification of 160X in combined cross polarized incident and transmitted light.

 

Northwest Africa 3159
Morocco or Algeria
Find: August 2005
Achondrite (eucrite)

History:  Purchased in 2005 August by Greg Hupé from a Moroccan dealer in Rissani.  Physical characteristics:  Seven stones with a total weight of 397 g.  Petrography: (A. Irving and S. Kuehner, UWS) Monomict breccia composed of rock and mineral clasts.  Plagioclase, exsolved pigeonite, silica polymorph, troilite, chromite and ilmenite (one grain with a very tiny zircon inclusion). Geochemistry: Plagioclase (An87.5-89.0Or0.4); Pyroxene grains consist of host orthopyroxene (Fs61.1-62.0Wo2.0-2.1; FeO/MnO = 30.9-34.1) with exsolution lamellae of clinopyroxene (Fs25.8-26.8Wo43.0-43.9; FeO/MnO = 28.4-34.4).  Classification:  Achondrite (eucrite breccia). Specimens: A total of 20.14 g of sample and one polished thin section are on deposit at UWS.  G. Hupé holds the main mass.