On Offer: 2.97 gram NWA 8291 mesosiderite meteorite end piece.

Type: Mesosiderite

Found: 2013

Country: Morocco

Description: 2.97 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: 2.97 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.

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Northwest Africa 8291

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

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 Fs_32.4±7.0Wo_2.7±0.7, Fe/Mn=28±2 n=9, olivine Fa_31.7.7, Fe/Mn=43, n=1, plagioclase Or_0.5±0.1Ab_9.0±1.5An_90.5±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
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