6.82g Eucrite Unbrecciated slice I HED Achondrite I NWA 12932
On Offer: 6.82g End piece of HED Achondrite unbrecciated basaltic Eucrite NWA 12932
Dimensions: 43 mm x 26 mm x 3 mm
Official Name: NWA 12932
Found: 2016
Location: North West Africa
Observed fall: No
Description: An amazing 6.82 gram slice of unbrecciated Eucrite HED Achondrite NWA 12932 with a fine-grained mix of plagioclase and pyroxene grains in the interior.
Hi, from the University of Colorado Boulder microprobe lab where we do the analysis and classification for our new meteorites.
What you get: Unbrecciated Eucrite meteorite slice as shown, membrane storage/display box, & signed Certificate of Authenticity.
We offer a 100% no questions asked 30 day return policy.
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| Northwest Africa 12932 | |||||||||||||||||||||||||||||
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| Basic information |
Name: Northwest Africa 12932 This is an OFFICIAL meteorite name. Abbreviation: NWA 12932 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass:  2.91 kg |
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| Classification history: |
This is 1 of 148 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites |
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| Comments: | Approved 21 Nov 2019 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12932 (NWA 12932) (Northwest Africa) Purchased: 2016 Classification: HED achondrite (Eucrite, unbrecciated) History: Purchased Nov 2016 by Dustin Dickens in Mauritania from anonymous dealer. Physical characteristics: Single stone, fusion-crusted exterior, broken surface and saw cut reveals a light colored, fine-grained mix of plagioclase and pyroxene grains. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows an ophitic texture with approximately 60% pyroxene and 35% plagioclase. Many pyroxenes have exsolution lamellae. Minor silica and troilite observed. Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs61.9±0.6Wo2.8±1.1, Fe/Mn=31±1, n=8; high-Ca pyroxene Fs28.2±2.1Wo43.2±2.3, Fe/Mn=31±1, n=4; plagioclase An86.7±4.1, n=6. Classification: Basaltic eucrite, equilibrated, unbrecciated. Specimens: 20.6 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass. |
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| Data from: MB108 Table 0 Line 0: |
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