This extremely fresh 2.27g part slice of NWA 7827 has likely only been on Earth for a very short time. Found in Mauritania in 2013, it has a bright, gorgeous matrix and partial FRESH fusion crust! Only a single stone weighing 468 grams was obtained and classified by A. Irving and S. Kuehner, UWS.
Specimen is encapsulated for safe handling and enjoyment with a beautiful custom background specific to this piece. Case measures approx. 2" x 3" in size.
Writeup from MB 102:
Northwest Africa 7827 (NWA 7827)
Purchased: 2013 Jan
Classification: Ordinary chondrite (L4)
Physical characteristics: A single stone (467.6 g) coated by extremely fresh, black fusion crust. The gray interior is crosscut by thin black, glassy veinlets.
Petrography: (A. Irving and S. Kuehner, UWS) Very fresh equilibrated chondrite composed of mostly well-formed, chondrules in a fine- grained matrix; however, some chondrules are only partial spheres and appear to have been sheared. Minerals are olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, kamacite and troilite.
Geochemistry: Olivine (Fa24.7-24.8), orthopyroxene (Fs21.4-21.5Wo1.6), subcalcic augite (Fs12.8Wo29.7), augite (Fs8.1Wo45.3).
Classification: Ordinary chondrite (L4). The interior glassy veinlets are indicative of moderate shock.
Specimens: A total of 20.2 g of material and one polished thin section are on deposit at UWB. MMartin holds the main mass.