NWA 12929, Fresh Vestan Eucrite, Fragment, .169g

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NWA 12929 consists of many stony fragments recovered from the Saharan Desert of Morocco in 2018. Samples were analyzed and classified by Dr. Carl Agee at the University of New Mexico. It is officially classified as a Vestan eucrite. It has a light colored matrix that is brecciated and has shock veining. 

The specimen being offered here is a small fragment. It is large enough to show the lithology and brecciation. It weighs approx. .165g (165mg).

Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing the specimen shown. Your purchase will include an ID label and gemjar.

From the Meteoritical Bulletin entry on NWA 12929 :

Northwest Africa 12929 (NWA 12929)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, monomict)

History: Purchased Dec. 2018 in Morocco from an anonymous dealer.

Physical characteristics: Many identically appearing pieces, desert weathered exterior, broken surface reveals a dark, fine grained interior.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows mild brecciation with approximately 60% pyroxene and 35% plagioclase. Many pyroxenes have exsolution lamellae. Minor silica and troilite observed. Shock melt veins are present.

Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs61.6±1.8Wo3.3±2.4, Fe/Mn=32±0, n=9; high-Ca pyroxene Fs36.7±9.5Wo33.4±10.9, Fe/Mn=31±0, n=4; plagioclase An89.4±3.1, n=7.

Classification: Monomict basaltic eucrite, equilibrated.