1.87g Mesosiderite Meteorite I NWA 8291
On Offer: 1.87 gram NWA 8291 mesosiderite meteorite end piece.
Description: 1.87 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: 1.87 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|
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
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 from MB 103:
Northwest Africa 8291 (NWA 8291)
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.
Specimens: 20.95 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.
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