Martian Meteorite 1.01g I Mars SHERGOTTITE - NWA 11668

Brought to you by: Top Meteorite

$ 505.00

On Offer: 1.01g Martian Meteorite fragment.

Type: SHERGOTTITE

Origin: MARS

Description: A 1.01 gram piece of Mars ejected by a meteorite impacting the surface of the Red Planet and hurling it to Earth. A lovely 1.01 gram specimen of a part of the SNC group of martian meteorites known as "Shergottite" NWA 11668. Whenever possible, Top Meteorite acquires meteorites direct from the source allowing us to offer exceptional quality specimens at very reasonable prices.

What you get: 1.01g NWA 11668 Martian Meteorite Specimen as shown, signed Certificate of Authenticity, shipping/storage membrane box.

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

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Northwest Africa 11668

Basic information

Name: Northwest Africa 11668
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11668
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 20 g

Classification
history:

Recommended:

Martian (shergottite) [explanation]

This is 1 of 174 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 27 Mar 2018

Writeup

Writeup from MB 107:

Northwest Africa 11668 (NWA 11668)

(Northwest Africa)

Purchased: 2018

Classification: Martian meteorite (Shergottite)

History: The meteorite was purchased in Tindouf, Algeria, from a Sahrawi dealer.

Physical characteristics: Four dark-green pieces partly covered with fusion crust.

Petrography: The meteorite is a medium grained basalt predominantly composed of up to 1.5 mm sized pyroxene and plagioclase grains. Pyroxene is intensely fractured pigeonite and augite displaying mottled compositional zoning. Plagioclase is completely transformed into compositionally homogeneous maskelynite. Minor phases are ilmenite, ulvöspinel, pyrrhotite and some Si-rich mesostasis.

Geochemistry: pigeonite: Fs_53.7±4.4Wo_14.3±2.4(Fs_35.5-59.6Wo_9.7-20.0, n=38, FeO/MnO=33-43); augite: Fs_26.2±7.0Wo_32.2±3.9(Fs_21.1-48.9Wo_20.6-37.8, n=32, FeO/MnO=27-40); feldspar: An_56.8Ab_42.0Or_1.2, n=15

Classification: Martian (basaltic shergottite)

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Tindouf, Algeria
Date:	P 2018
Mass (g):	20
Pieces:	4
Class:	Martian (shergottite)
Shock stage:	strong
Weathering grade:	low
Ferrosilite (mol%):	53.7; 26.2
Wollastonite (mol%):	14.3; 32.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	4.2
Type spec location:	MNB

ID - NWA116681802

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