On Offer:  7.39g Ureilite Achondrite meteorite end piece with official name Northwest Africa 5725.

Official name: Northwest Africa 5725

Abbreviation: NWA 5725

Classification: Ureilite 

Description:  A 7.39 gram end piece of NWA 5725. This Ureilite meteorite has stretched olivine and pigeonite grains together with graphite and metal that give a squeezed appearance.

The ureilite meteorites are famous for having large equant olivine and pyroxene crystal grains, as well as a relatively large amount of graphite. Occasionally this graphite, which is made of the element carbon, is put under such intense pressure (likely due to hypervelocity collisions of its parent asteroid with other asteroids) that microscopic faulted and twinned cubic diamonds are formed. These extraterrestrial diamonds are known as "lonsdaleite". 

The Ureilite meteorites are considered to be "primitive achondrites". This is in reference to their having some characteristics similar to the more evolved and differentiated achondrites, while also displaying some characteristics of less evolved recrystallized chondrites. In this way, they are "primitive". They are closer to achondrites (lacking chondrules) than to chondrites, but they have not quite evolved from their chondritic precursors into fully fledged achondrites.

What you get:  7.39 gram end piece of NWA 5725  Ureilite meteorite specimen as shown, membrane storage/display box, and signed Certificate of Authenticity.

We offer a 100% no questions asked 30 day return policy.  

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Northwest Africa 5725