For Sale IconNWA 8657 Martian Shergottite Meteorites for Sale

Location: Sahara Desert, exact location unknown.

Purchased: September 2014.

Classification: Martian meteorite (Shergottite).

Description: History: Purchased by Eric Twelker from a Moroccan dealer at the Denver Show in September 2014.
Physical characteristics: Wind-ablated exterior with some small patches of dull black fusion crust. Cut interior surfaces are overall greenish-gray with clear, glassy maskelynite evident, and sporadically distributed dark glass pockets and veinlets. Petrography: (A. Irving and S. Kuehner, UWS) Diabasic texture. Composed predominantly of complexly zoned, prismatically-twinned clinopyroxene (up to 3.8 mm long) and maskelynite laths (up to 1.8 mm long) with accessory ilmenite, ulvöspinel, pyrrhotite, merrillite, chlorapatite and vesicular glass. Minor components are anorthoclase (containing blades of silica polymorph) and symplectitic intergrowths of ferrosilite+silica.
Geochemistry: Subcalcic augite (Fs20.8-21.8Wo36.4-34.1, FeO/MnO = 28-30, N = 2), ferroan subcalcic augite (Fs39.1Wo30.7, FeO/MnO = 39), pigeonite (Fs33.7-53.1Wo11.8-11.6, FeO/MnO = 38-39, N = 2), ferropigeonite rims (Fs65.1-67.1Wo18.7-14.4, FeO/MnO = 37-41, N = 3), ferrosilite (Fs75.4Wo2.0, FeO/MnO = 41), plagioclase (maskelynite) (An42.3-45.3Or2.8-2.7, N = 2), anorthoclase (An33.4Or15.0). Classification: Martian (shergottite, diabasic). Likely paired with NWA 8656.

Link to Meteoritical Bulletin Database.

Other references:

Link to Dr. Anthony Irving's Martain Meteorite Page

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#NWA8657-217 #NWA8657-250 #NWA8657-2501 #NWA8657-260 About Scale:  Each photo has a small one centimeter cube.  That's a little less than a half inch on a side.  The coin above is a US dime.
Weight: 0.217 gm Weight: 0.250 gm Weight: 0.250 gm Weight: 0.260 gm
Features: Part slice Features: Part slice Features: Part slice Features: Part slice
$70 $80 sold $83

#NWA8657-261 #NWA8657-3331 #NWA8657-397 #NWA8657-4001 #NWA8657-4002
Weight: 0.261 gm Weight: 0.333 gm Weight: 0.397 gm Weight: 0.400 gm Weight: 0.400 gm
Features: Part slice Features: Part slice Features: Part slice Features: Part slice Features: Part slice
sold $105 $124 $125 $125

#NWA8657-418 #NWA8657-4501 #NWA8657-453 #NWA8657-508 #NWA8657-511
Weight: 0.418 gm Weight: 0.450 gm Weight: 0.453 gm Weight: 0.508 gm Weight: 0.511 gm
Features: Part slice Features: Part slice Features: Part slice Features: Part slice Features: Part slice
sold $140 $141 $157 sold

#NWA8657-1-196 #NWA8657-1-533 #NWA8657-1-871 #NWA8657-1-957 #NWA8657-3-593
Weight: 1.196 gm Weight: 1.533 gm Weight: 1.871 gm Weight: 1.957 gm Weight: 3.593 gm
Features: Part slice Features: Part slice Features: Part slice Features: Slice Features: End
$364 $465 $566 $592 $1083

#NWA8657-3-784 #NWA8657-7-254 #NWA8657-18-642
Weight: 3.784 gm Weight: 7.254 gm Weight: 18.642 gm
Features: Slice Features: Slice Features: End
$1140 sold sold