This 124-gram fragment of NWA 7464 is a textbook representative of this find. The accessory olivine found in this specimen is visible throughout as green glassy sheens throughout the cataclysmic texture. Remnant fusion crust is present on two sides of the stone.
Buy the entire stone at at the lowest price on the internet--look around! If it doesn't sell whole, we may eventually process the stone and offer slices, however they will be at a higher rate due to labor, time, prep and cut-loss.
Physical characteristics: Among the various stones constituting this find, most are extremely fresh, but some have iron oxide staining (presumably as a result of variable distribution and degree of weathering of accessory iron metal).
Petrography: (A. Irving and S. Kuehner, UWS) Texturally, the material consists of larger crystal fragments in a matrix of finer, angular grains of the same minerals – this could be termed a matrix-poor breccia, cataclastic or mortar texture. The predominant mineral is orthopyroxene accompanied by accessory olivine, clinopyroxene, anorthite, chromite, Ni-poor metal (more stained in some stones) and troilite.
Geochemistry: Orthopyroxene (Fs24.7-25.5Wo3.7-3.4; FeO/MnO = 27-31), olivine (Fa25.1; Fa28.3; FeO/MnO = 48-50), clinopyroxene (Fs10.4Wo43.4; FeO/MnO = 22).