NWA 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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| #NWA8657-105 | #NWA8657-136 | #NWA8657-147 | #NWA8657-175 | 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: 0.105 gm | Weight: 0.136 gm | Weight: 0.147 gm | Weight: 0.175 gm | |
| Features: Part slice | Features: Part slice | Features: Part slice | Features: Part slice | |
| Price: sold | sold | sold | sold |
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| #NWA8657-213 | #NWA8657-217 | #NWA8657-250 | #NWA8657-2501 | #NWA8657-260 |
| Weight: 0.213 gm | 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 | Features: Part slice |
| $69 | $70 | $80 | sold | $83 |
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| #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 |
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| #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 |
| $130 | $140 | $141 | $157 | sold |
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| #NWA8657-532 | #NWA8657-547 | #NWA8657-602 | #NWA8657-1-145 | #NWA8657-1-267 |
| Weight: 0.532 gm | Weight: 0.547 gm | Weight: 0.602 gm | Weight: 1.145 gm | Weight: 1.267 gm |
| Features: Part slice | Features: Part slice | Features: Part slice | Features: Part slice | Features: End, polished. |
| sold | $169 | sold | sold | sold |
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| #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 |
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| #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 |
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