On Offer: 185.2g Diogenite HED achondrite meteorite

Official name: NWA 16081

Type: Diogenite

Parent Body: Vesta or Vestoid

Description: 185.2 gram main mass specimen of an amazing diogenite with extensive green pyroxene crystals and black shock veins throughout the meteorite. This amazing specimen has it all, a flat surface to display it as a complete specimen with fresh black fusion crust, a window into the interior and evidence of the kinetic force that ejected it in the form of shock veins.

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 have distinct mineralogies, the Howardite is a breccia of the Eucrite and Diogenite.

The HEDs are differentiated achondritic meteorites thought to originate from Vesta, or a smaller Vesta-like asteroid known as a vestoid.

What you get: 185.2 gram diogenite meteorite specimen which is the main mass for the 16081 classification, as shown, & signed Certificate of Authenticity.

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

SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW

Northwest Africa 16081

Basic information

Name: Northwest Africa 16081
This is an OFFICIAL meteorite name.
Abbreviation: NWA 16081
Observed fall: No
Year found: 2023
Country: Niger
Mass: 419 g

Classification
history:

Recommended:

Diogenite [explanation]

This is 1 of 515 approved meteorites classified as Diogenite.[show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 21 Aug 2023

Writeup

Writeup from MB 112:

Northwest Africa 16081 (NWA 16081)

Niger

Purchased: January 2023

Classification: HED achondrite (Diogenite)

History: Purchased by J. Eisler from a meteorite dealer in Mauritania who purchased it from the finder in Niger.

Physical characteristics: Two stones of approximate equal size and one slightly smaller stone, each partially covered in black fusion crust with exposed areas showing a light colored interior with a slight green hue.

Petrography: (D. Dickens, CCMS and R. G. Mayne, TCU) This meteorite is composed predominately of orthopyroxene with subhedral grains of up to 1mm. Most orthopyroxene grains show some exsolution. Minor and accesory phases include plageoclase, Ti-chromite, and silica.

Geochemistry: (D. Dickens, CCMS and R. G. Mayne, TCU) low-Ca pyroxene: Fs_24.0±0.5Wo_2.2±1.2range Fs_23.9-24.5Wo_1.2-4.7, FeO/MnO=28±2, ( n=8); calcic plagioclase: An_82.6±0.2range An_82.4-82.7, (n=2).

Classification: HED achondrite (Diogenite)

Specimens: 20 g including probe mount at TCU; remainder with Mr. J. Eisler.

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P January 2023
Mass (g):	419
Pieces:	3
Class:	Diogenite
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	24.0±0.5
Wollastonite (mol%):	2.2±1.2
Classifier:	D. Dickens, CCMS and R. G. Mayne, TCU
Type spec mass (g):	22.3
Type spec location:	TCU
Main mass:	J. Eisler
Comments:	Field name TM01; submitted by D. Dickens; submitted by Dustin Dickens

Institutions
and collections

TCU: Oscar E. Monnig Collection, Department of Geology, Texas Christian University, Ft. Worth, TX 76129, United States; Website (institutional address; updated 24 Feb 2012)
TM: Geoscience Museum, Transvaal Museum, P. O. Box 413, Pretoria 0001, South Africa (institutional address; updated 3 Mar 2011)