7.26g Mesosiderite Meteorite I NWA 8291
On Offer: 7.26 gram NWA 8291 mesosiderite meteorite end piece.
Type: Mesosiderite
Found: 2013
Country: Morocco
Description: 7.26 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: 7.26 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 | |||||||||||||||||||||
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| Basic information |
Name: Northwest Africa 8291 This is an OFFICIAL meteorite name. Abbreviation: NWA 8291 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass:  296 g |
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| Classification history: |
This is 1 of 235 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites |
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| 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. |
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| Data from: MB103 Table 0 Line 0: |
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| Institutions and collections |
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