NWA 7349, Ureilite Achondrite, Micromount

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NWA 7349 was recovered as a single small stone out of the Moroccan Sahara in 2012. It was analyzed by Dr. Carl Agee at the University of New Mexico. It was classified as an olivine rich ureilite achondrite.

Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing a small fragment like the one shown. Your purchase will include a labeled gemjar.

From the Meteoritical Bulletin entry :

Northwest Africa 7349 (NWA 7349)


Purchased: May 2012

Classification: Ureilite

History: Purchased by Sean Tutorow from Morocco, May 2012.

Physical characteristics: Single stone with a dark, coarse granular exterior. Saw cut surface reveals a mosaic of dark green and brown grains, a few weathering veins.

Petrography: C. Agee) This meteorite consists of approximately 50% olivine and 50% low-Ca pyroxene, poikiolitic texture with generally smaller (100-300 μm) olivine inclusions in larger host pyroxene. Numerous Fe-metal veins occupying grain boundaries. Many of the veins have been oxidized by desert weathering. The metal veins are commonly haloed by many tiny metal blebs grading into adjacent olivine crystals.

Geochemistry: (C. Agee and N. Wilson, UNM, by EMPA). Olivine cores Fa23.2.0±0.9, Fe/Mn=50±4, Cr2O3=0.27±0.02 wt%, n=21; olivine rim Fa12.6, Fe/Mn=23, Cr2O3=0.28 wt%, n=1; low-Ca pyroxene Fs19.3±0.0Wo4.3±0.0, Fe/Mn=31±0 Cr2O3=0.72±0.00 wt%, n=2.

Classification: Achondrite (Ureilite). Low-Ca pyroxene present, pigeonite absent. Moderately weathered.

Specimens: 22 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.