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42.22g Diogenite Meteorite piece I HED Meteorite from Asteroid 4 Vesta I NWA 18094
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- $ 630.00
On Offer: 42.22g NWA 18094, orthopyroxenite diogenite HED achondrite meteorite.
Name: Northwest Africa 18094
Abbreviation: NWA 18094
Type: Diogenite
Observed fall: No
Year found: 2018
Country: Morocco
Parent Body: Vesta or Vestoid
Description: 42.22 gram specimen of an amazing orthopyroxenite diogenite. This diogenite has a coarse grained texture of mostly low-Ca pyroxene with several large black chromite crystals visible throughout the cut surfaces. Only a single small 86 gram gray-green stone was found with a small amount of remnant glassy black fusion crust on one side. This specimen represents the remaining main mass of this classification after analysis with only one smaller end piece available.
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 smaller Vesta-like asteroids known as vestoids that were likely once part of a larger Vesta. The nearly monomineralic orthopyroxenite diogenites likely formed alongside olivine-bearing diogenites in the upper mantle of Vesta with, plutons, dikes and/or batholiths of diogenitic material pushing into the eucritic crust prior to the ejection event.
What you get: 42.22 gram NWA 18094 diogenite meteorite specimen as shown, & signed Certificate of Authenticity.
We offer a 100% no questions asked 30 day return policy.
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW
Northwest Africa 18094
| Basic information |
Name: Northwest Africa 18094 This is an OFFICIAL meteorite name. Abbreviation: NWA 18094 Observed fall: No Year found: 2018 Country: Morocco Mass: 86 g |
|---|---|
| Classification history: |
Meteoritical Bulletin, MB 114 (2026): Diogenite |
| Comments: | Approved 5 Dec 2025 |
| Writeup |
Writeup from MB 114: Northwest Africa 18094 (NWA 18094) Morocco Purchased: 2018 Classification: HED achondrite (Diogenite) History: Purchased from a meteorite dealer in Erfoud, Morocco, in 2018 by Kathryn O'Flynn and sold to Maria Aguayo later that same year. The stone was misplaced along with several other meteorites until it was rediscovered in a storage box with the other misplaced stones in 2025. Physical characteristics: A single gray-green stone with remnant glassy black fusion crust covering approximately 20% of the surface. Saw cut reveals a mottled gray interior with some black specks. Petrography: (D. Dickens, LMAC ) This meteorite is a coarse-grained orthopyroxenite. It is a monomineralic rock composed of >98% equilibrated orthopyroxene. Chromite makes up <2% and is the only minor phase present. Chromite is found as either well-formed large grains up to 4 mm, or as μm to sub-μm inclusions in orthopyroxene. Geochemistry: (D. Dickens, LMAC and A. S. Bell, UColo) Orthopyroxene Fs23.6±0.3Wo2.5±0.1, FeO/MnO = 29±1 (n=13). Classification: Achondrite HED (Diogenite) Specimens: Type specimen of 21 g at TCU. Main mass with Issac Schroeder. |
| Data from: MB114 Table 0 Line 0: |
Place of purchase: Morocco Date: P 2018 Mass (g): 86 Pieces: 1 Class: Diogenite Shock stage: low Weathering grade: low Ferrosilite (mol%): 23.6±0.3 Wollastonite (mol%): 2.5±0.1 Classifier: D. Dickens, LMAC Type spec mass (g): 17.4 Type spec location: TCU Main mass: Maria Aguayo Comments: Field name LMAC 500; submitted by Dustin Dickens |
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