NWA 8657, NWA 10703 Martian Shergottite Meteorites for Sale
Location: Sahara Desert, exact location unknown.
Purchased: September 2014.
Classification: Martian meteorite (Shergottite).
Description (NWA8657): 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 and NWA 10703.
Link to Meteoritical Bulletin Database.
Other references:
Link to Dr. Anthony Irving's Martain Meteorite Page
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| #NWA8657-159 | #NWA10703-177 | #NWA10703-179 | #NWA8657-205 | 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: 0.159 gm | Weight: 0.177 gm | Weight: 0.179 gm | Weight: 0.205 gm | |
| Features: Part slice | Features: Part slice | Features: Part slice | Features: Part slice | |
| Price: sold | sold | sold | sold |
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| #NWA8657-1-193 | #NWA8657-1-352 | #NWA8657-1-920 | #NWA8657-2-016 | #NWA8657-2-094 |
| Weight: 1.193 gm | Weight: 1.352 gm | Weight: 1.920 gm | Weight: 2.016 gm | Weight: 2.094 gm |
| Features: Part slice | Features: Part slice | Features: Part slice | Features: Part slice | Features: Part slice |
| $363 | $411 | $581 | sold | $633 |
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| #NWA8657-14-410 |
| Weight: 14.410 gm |
| Features: Part slice |
| $3900 |
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