On Offer: 356.98 gram main mass of the amazing HED achondrite howardite meteorite NWA 18080 (awaiting publication).
Type: HED Howardite
Description: 356.98 gram main mass of HED howardite NWA 18080 with polished face.
The HED Meteorites: The HED meteorite group is so named for the three types of meteorites that comprise the group; Howardite, Eucrite and Diogenite. The Eucrite and Diogenite are distinct meteorites, while the Howardite is a mix of the Eucrite and Diogenite lithologies. The HEDs are differentiated achondritic meteorites previously thought to originate from Vesta, but now leading researchers are starting to think they originated from a Vesta-like asteroid (not Vesta itself) that was destroyed long ago. This is because we also find iron meteorites with similar isotopic genetics as the HED, leading researchers to conclude the HED meteorites come from a large Vestan-like body that was in a large enough collision to also liberate pat or all of its metal core.
NWA 18080 BSE Image 01 - Courtesy Laboratory of Meteorites Analysis and Classification
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NWA 18080 BSE Image 02 - Courtesy Laboratory of Meteorites Analysis and Classification
NWA 18080 BSE Image 03 - Courtesy Laboratory of Meteorites Analysis and Classification
This meteorite is a polymict breccia of mineral clasts and lithic clasts set in a matrix of similar composition. Minerals are diogenitic orthopyroxene, eucritic low-Ca pyroxene, eucritic pigeonite, eucritic augite, and calcic plagioclase. Pigeonite shows exsolution. A clast of ~400 µm with fractured grains was observed with ophitic and subophitic texture containing intersecting glassy plagioclase laths (likely maskelynite) eclosed by and enclosing pyroxene grains. The mode of eucritic to diogenitic material is estimated to be approximately 70 vol.% eucritic to 30% vol.% diogenitic. No olivine was found. Accessory phases are kamacite, troilite, and chromite.
What you get: 356.98g Howardite meteorite specimen as shown and signed Certificate of Authenticity.
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