1.75g Mesosiderite Meteorite I NWA 8291

  On Offer: 1.75 gram NWA 8291 mesosiderite meteorite end piece.  Type: Mesosiderite Found: 2013 Country: Morocco Description: 1.75 gram specimen of NWA 8291 Mesosiderite meteorite. This is a "half cut" giving a collector / educator the best of both worlds, the natural exterior as well as a view to the interior. What you get: 1.75 gram NWA 8291 Mesosiderite stoney-iron meteorite specimen as shown, storage/shipping membrane box, and Certificate of Authenticity. I offer a 100% no questions asked 30 day return policy.    SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW Northwest Africa 8291 Basic information Name: Northwest Africa 8291     This is an OFFICIAL meteorite name.Abbreviation: NWA 8291Observed fall: NoYear found: 2013Country: (Northwest Africa)Mass: 296 g Classification  history: Meteoritical Bulletin:   MB103   (2014)   Mesosiderite Recommended:   Mesosiderite    [explanation] This is 1 of 235 approved meteorites classified as Mesosiderite.   [show all]Search for other: Mesosiderites, Metal-rich meteorites Comments: Approved 14 Mar 2014 Writeup Writeup from MB 103: Northwest Africa 8291 (NWA 8291) (Northwest Africa) Purchased: 2013 Classification: Mesosiderite History: Purchased by Brahim Tahiri from a Moroccan meteorite hunter and sent to his partner Sean Tutorow for classification, 2013. Physical characteristics: 45 small stones that are visually identical, irregular dark exterior with some iron staining, saw cut reveals mm-sized, bright metal grains set in dark brown silicate matrix. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 70% silicate minerals and 30% metal. Silicate mineralogy ~70% pyroxene, ~25% plagioclase, accessory silica and olivine. Silicate grain sizes up to 300 μm. Metal: ~90% kamacite, ~10% taenite, 5-10% of total metal is oxidized. Metal domains up to 3 mm. Many metal/oxide veinlets and blebs throughout. Geochemistry: (C. Agee and H. Miley, UNM) EMPA. Low Ca-pyroxene Fs32.4±7.0Wo2.7±0.7, Fe/Mn=28±2 n=9, olivine Fa31.7.7, Fe/Mn=43, n=1, plagioclase Or0.5±0.1Ab9.0±1.5An90.5±1.6, n=7. Classification: Mesosiderite Specimens: 20.95 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. Data from:  MB103  Table 0  Line 0: Place of purchase: Morocco Date: P 2013 Mass (g): 295.7 Pieces: 45 Class: Mesosiderite Classifier: C. Agee, UNM Type spec mass (g): 20.95 Type spec location: UNM Main mass: Sean Tutorow Comments: Field name G509; submitted by C. Agee, UNM Institutions   and collections