Description
NWA 11184 is a perfect example of a howardite, with that classic look! Shattered bits and pieces of eucrite and diogenite make up this extraordinary, beautiful space gem. Howardite’s, the ‘H’ in HED, are regolith breccia’s believed to be from the asteroid 4 Vesta. They are the result of countless impacts, the debris buried and solidified only to be ejected at a later date and sent on a collision course with Earth!
Howardites of this quality regularly sell for $50/g or more, so this is a fantastic bargain at $38/g. Your specimen comes in a quality gem jar and is accompanied by an ID card, beginning it’s record of provenance.
Northwest Africa 11184
Basic informationName: Northwest Africa 11184
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11184
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 83 g
Classification
history:
This is 1 of 336 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments:Approved 28 Mar 2017
WriteupWriteup from MB 106:
Northwest Africa 11184 (NWA 11184)
(Northwest Africa)
Purchased: 2015
Classification: HED achondrite (Howardite)
History: Purchased by Larry Atkins from Morocco in December 2015.
Physical characteristics: Single stone, no fusion crust. A saw cut reveals a breccia with green, white, and dark-gray clasts.
Petrography: (C. Agee, UNM) This meteorite is a polymict breccia consisting of ~75% diogenitic material and ~25% eucritic material, mostly in the form of cumulate eucrite clasts 500-1500 μm. Accessory kamacite, chromite and ilmenite are present.
Geochemistry: (C. Agee and B. Ha, UNM) diogenite olivine Fa38.7±4.0, Fe/Mn=52±1, n=3; diogenite low Ca pyroxene Fs22.2±1.3Wo1.9±0.7, Fe/Mn=30±0, n=3; eucrite pigeonite Fs52.6±5.7Wo11.1±8.2, Fe/Mn=30±2, n=4; plagioclase An89.0±0.6Ab10.5±0.6Or0.5±0.1, n=4.
Classification: Howardite
Specimens: 16.8 g including a probe mount on deposit at UNM, Larry Atkins holds the main mass.
Data from:
MB106
Table 0
Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):83
Pieces:1
Class:Howardite
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):38.7±4.0
Ferrosilite (mol%):22.2±1.3; 52.6±5.7
Wollastonite (mol%):1.9±0.7; 11.1±8.2
Classifier:C. Agee, UNM
Type spec mass (g):16.8
Type spec location:UNM
Main mass:Larry Atkins
Comments:Submitted by C. Agee
