1.99g Diogenite I Beautiful HED Meteorite from Asteroid 4 Vesta

  On Offer: 1.99g Diogenite HED achondrite meteorite slice Official name: NWA 16081 Type: Diogenite Parent Body: Vesta or Vestoid Description: 1.99 gram slice of an amazing diogenite with extensive green pyroxene crystals and black shock veins throughout the meteorite.  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: 1.99 gram diogenite meteorite specimen for the NWA 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 16081Observed fall: NoYear found: 2023Country: NigerMass: 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: Fs24.0±0.5Wo2.2±1.2 range Fs23.9-24.5Wo1.2-4.7, FeO/MnO=28±2, ( n=8); calcic plagioclase: An82.6±0.2 range An82.4-82.7, (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)