NWA 5884, Ureilite Primitive Achondrite, Slice, .9g

$24.00
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A single brownish-colored stone was recovered in the Moroccan Sahara in 2009. The stone had an unusual texture and appearance, so a sample was sent for analysis. It was officially classified as a primitive achondrite of the ureilite type with highly reduced graphite and olivine. 

The specimen being offered here is a professionally-prepared slice with an interesting crystal grain structure. It weighs approx. .9g (900mg).

Refer to the photos. The black centimeter cube is shown for scale and is not included. You are purchasing the slice shown. Your purchase will include a labeled gemjar for safe storage.

From the Meteoritical Bulletin entry on NWA 5884 :

Northwest Africa 5884 (NWA 5884)

(Northwest Africa)

Purchased: 2009

Classification: Ureilite

History: The meteorite was bought in 2009 from a Moroccan meteorite dealer in Erfoud, Morocco.

Physical characteristics: Brownish individual lacking any fusion crust.

Petrography: The meteorite shows a cumulate texture of coarse up to 1.5 mm sized Cr-rich olivine and pigeonite crystals. It contains flaky graphite; olivine displays characteristic reduced rims.

Geochemistry: reduced rims in olivine: Fa5.8-8.5; Cr2O3 in ol: ~0.6 wt%