CLASSIFIED & APPROVED AS EXTREMELY RARE Achondrite Meteorite - 7 g

NWA 12445 ANOMALOUS BRECCIA EUCRITE On offer one specimen of 7 grams. There are only 10 meteorites classified & approved as an anomalous breccia eucrite & this is one of them. This is an extremely rare meteorite. This unique meteorite is officially classified & approved as NWA 12445 and was recently discovered & purchased in Algeria in Aug 2018 & classified by world renowned and profoundly respected Dr Anthony J. Irving and team at University of Washington. Name: Northwest Africa 12445 this is an official meteorite name NWA 12445 ANOMALOUS BRECCIA EUCRITE YOU ARE BUYING ONE SPECIMEN OF 7 GRAM GUARANTEED AUTHENTICITY The authenticity of this meteorite has a 100% guarantee. Signed Certificate of Authenticity Included First express class delivery and provenance provided. I SHIP WORLDWIDE WITH DHL, UPS OR SIMILAR EXPRESS SERVICE, TRACKED & TRACED This Items will not include any reference, and will be posted as a "Gift" for Customs purposes TRULY A BEAUTIFUL MUSEUM QUALITY SHOWPIECE FRESH FUSION CRUST WITH VELVETY TEXTURE AND TONS OF CONTRACTION CRACKS OFFICIAL CLASSIFICATION DATA SOURCE: THE METEORITICAL SOCIETY INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE LUNAR AND PLANETARY INSTITUTE METEORITICAL BULLETIN DATABASE header\t Met. Soc Home Publications Contacts Northwest Africa 12445 Basic information\t. Name: Northwest Africa 12445 This is an OFFICIAL meteorite name. Abbreviation: NWA 12445 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: help 797 g Classification history: \t Recommended: \t\t\t. Eucrite-an This is 1 of 10 approved meteorites classified as Eucrite-an. Comments: \t. Approved 21 Mar 2020 Writeuphelp\t Writeup from MB 109: Northwest Africa 12445 (NWA 12445) (Northwest Africa) Purchased: 2018 Aug Classification: HED achondrite (Eucrite, anomalous) History: A total of 21 similar stones (total 797 g) were recovered ~70 m apart at a location in Algeria, and were purchased by Mbark Arjdal in August 2018 from an Algerian dealer. Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of some lithic eucrite clasts plus a lot of related, angular crystalline debris in a finer grained matrix. Lithic clasts have microgabbroic to subophitic textures. Minerals are exsolved pigeonite (pale orange in thin section) , anorthite (exhibiting undulose extinction) , silica polymorph, fayalite, ilmenite, troilite and minor Ni-free metal. Geochemistry: Low-Ca pyroxene host (Fs67. 7±1. 6Wo3. 1±1. 3, range Fs66. 0-70. 6Wo1. 7-5. 3, Fe. O/Mn. O = 29-31, N = 6; Fs59. 7Wo2. 4, Fe. O/Mn. O = 28) , high-Ca pyroxene exsolution lamellae (Fs32. 1±2. 0Wo42. 8±0. 7, range 29. 2-34. 4Wo42. 0-43. 7, Fe. O/Mn. O = 30-33, N = 6; Fs24. 7-25. 9Wo44. 5-42. 9, Fe. O/Mn. O = 29-30, N = 2) , fayalitic olivine (Fa73. 8±6. 5, range Fa69. 3-78. 4, Fe. O/Mn. O = 46, N = 2) , anorthite (An91. 9-93. 3Or0. 6-0. 3, N = 2) . Classification: Eucrite (breccia, anomalous) . The predominance of highly ferroan low-Ca and high-Ca pyroxenes in this specimen is an anomalous feature; these now-exsolved highly ferroan pigeonites are reminiscent of similar pyroxenes in anomalous ferroan eucrite NWA 11729. Specimens: 38. 2 g including one polished thin section at UWB; remainder with Mr. M. Arjdal. Data from: MB109 Table 0 Line 0: \t Place of purchase: \t. Algeria Date: \t. P 2018 Aug Mass (g) : \t797 Pieces: \t21 Class: \t. Eucrite-an Shock stage: \tmoderate Weathering grade: \tlow Fayalite (mol%) : \t73. 8±6. 5 (N=2) Ferrosilite (mol%) : \t67. 7±1. 6 (n=6) Wollastonite (mol%) : \t3. 1±1. 3 Classifier: \t. A. Irving and S. Kuehner, UWS Type spec mass (g) : \t38. 2 Type spec location: \t. UWB Main mass: \t. M. Arjdal Comments: \t. Work name Arj18-A10; submitted by A. Irving Institutions and collections\t. UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) Catalogs: \t References: \t. Published in Meteoritical Bulletin, no. 109, in preparation (2020) Find references in NASA ADS: \t. NASA ADS Find references in Google Scholar: \t. Google Scholar Photos: \t Credit\t. Photos Public domain photographs: A. Irving\t. Added to database 12 Mar 2020