Hello and thank you for viewing my listing. Today you are purchasing a cutting fragment specimen of NWA 16818 Achondrite Howardite Meteorite from Northwest Africa. The green Howardite! This is one of the most interesting and spectacular Howardites I have yet to classify. The matrix is just full of all kinds of inclusions/clasts, brecciated eucritic chunks, wow! Classified at the University of New Mexico by Carl Agee. I couldn't wait to share this one! I have pre-prepped the entire stone; it has hit the 300 specimen and no more section. This meteorite has been being studied for over 2.5 years now. The specimen you see in pictures is a reference specimen; this is NOT the exact specimen you will receive. I will make them as they sell. Gem case NOT included, for picture reference only. Below is the data for my classification. Excellent gorgeous addition to your collection.

THE 300 CLUB IS A NEW CATEGORY I HAVE MADE. IT HAS COME TO MY ATTENTION LAST YEAR THAT A LOT OF MY CLASSIFICATIONS, ESPECIALLY THE OLDER ONES FROM 2006 AND ON, WON'T EVER HIT 300 IN SPECIMENS MADE AVAILABLE. I WILL BE STARTING AT MY FIRST CLASSIFICATIONS AND GOING THROUGH THEM ONE BY ONE THIS YEAR AND FIGURING OUT HOW MANY WILL MAKE IT TO THE 300 CLUB AND HOW MANY WILL KEEP GOING BEYOND THAT. A LOT OF THIS DEPENDS ON THE ORIGINAL WEIGHT CLASSIFIED IN THE BEGINNING, MAKING THEM MUCH MORE RARE AND VERY LOW NUMBERS. SOME SPECIMENS WILL BARELY MAKE IT TO THE 100 CLUB. I HAD NO IDEA YEARS AGO THAT I WOULD DO THE TUCSON AND DENVER SHOWS FOR 10 YEARS AND THEN BIG UNIVERISITIES WOULD GOBBLE UP LARGE SPECIMENS MAKING MY WEIGHTS GO DOWN VERY FAST WITH SOME OF THESE CLASSIFICATIONS. PLEASE PAY ATTENTION TO THIS SECTION, WHEN THEY ARE GONE, THEY ARE GONE. ALL SPECIMENS COA'S WILL BE MARKED 103 OF 300 ETC.

THE NEW WAY I AM DOING THINGS; THE ENTIRE STONE IS PREPPED WHILE UNDER CLASSIFICATION WITH THE UNIVERSITY AND I WILL FIGURE OUT HOW MANY ARE AVAILABLE LONG BEFORE I OFFER THEM NOW. METEORITES ARE ALL ABOUT COLLECTIBILITY AND PROVENANCE AND I'M A RECORD KEEPING FOOL OF MY COLLECTION. I'VE CREATED A LIBRARY TO MY LEFT, LOL. CHEERS!

DATA: THERE HAVE ONLY BEEN "7" SPECIMENS SOLD TO DATE OF NWA 16818. I WILL RETIRE THIS NWA NUMBER AT 300 IN MY BOOK OF PROVENANCE. THANK YOU. WAS THAT TOO MUCH TO DIGEST??? LOL.

My catalog number is G733-0103 and weighs in at micro grams and comes with my card of authenticity for provenance. Remember, provenance is a must when collecting meteorites. I have designed a COA for NWA 16818, as with all of my classified material. The specimen you see pictured is NOT the exact specimen you are purchasing. Each card comes with catalog number, weight and my signature of authenticity. Thanks again for viewing. Cheers!

Thanks again for viewing and my shipping is like this, the first is usually only $5.95 and .50 cents for each additional item, unless over 60 grams, then 1.00 per item. Cheers and thanks again for stopping by.

Northwest Africa 16818
Basic informationName: Northwest Africa 16818
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16818
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 513 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 458 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments:Approved 19 Dec 2024
Writeuphelp
Writeup from MB 113:

Northwest Africa 16818 (NWA 16818)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Howardite)

History: Purchased by Sean Tutorow in Morocco in December 2021.

Physical characteristics: A single, light colored individual lacking fusion crust. Saw cut reveals a fragmental breccia with clasts and crystal fragments of varying size and color, set in a light tan groundmass.

Petrography: (C. Agee, UNM) This meteorite is a polymict fragmental breccia with diogenite, cumulate eucrite, and basaltic eucrite clasts. Clasts are up to several mm in size set in a very fine-grain cataclastic groundmass. Plagioclase makes up approximately 20% of modal mineralogy of this meteorite. Minor phases observed were chromite, ilmenite, troilite, silica and low-Ni Fe metal. The percentage of diogenite material is ~60 vol%, the percentage of eucrite material is ~40 vol%.

Geochemistry: (M. Spilde and C. Agee, UNM) Diogenitic low Ca-pyroxene Fs23.4±2.7Wo2.4±0.9, Fe/Mn=28±2, n=4; cumulate eucrite low Ca-pyroxene Fs34.7±0.2Wo4.1±1.5, Fe/Mn=28±1, n=2; basaltic eucrite low-Ca pyroxene Fs59.5Wo5.2, Fe/Mn=32, n=1; plagioclase An91.3±3.2Ab8.3±3.0, n=4.

Classification: HED achondrite (Howardite).

Specimens: 22.4 g on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB113
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):512.6
Pieces:1
Class:Howardite
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):23.4±2.7, 34.7±0.2, 59.5
Wollastonite (mol%):2.4±0.9, 4.1±1.5, 5.2
Classifier:C. Agee, UNM
Type spec mass (g):22.4
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G733; submitted by C. Agee, UNM