{"product_id":"11-03g-martian-shergottite-olivine-phyric-meteorite","title":"11.03g Martian Evolved Basaltic Shergottite Meteorite I NWA 17754","description":"\u003cp\u003e\u003cstrong\u003eOn Offer:\u003c\/strong\u003e 11.03 gram exceptional fusion crusted \u003cmeta charset=\"utf-8\"\u003especimen of the evolved basaltic Martian shergottite meteorite NWA 17754. \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cstrong\u003eOfficial Name:\u003c\/strong\u003e Northwest Africa 17754\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbbreviation:\u003c\/strong\u003e NWA 17754\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eClass:\u003c\/strong\u003e Martian (shergottite)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShock stage:\u003c\/strong\u003e high\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeathering grade:\u003c\/strong\u003e low\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYear found: \u003c\/strong\u003e2025\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDescription:\u003c\/strong\u003e A\u003cspan class=\"rQesXe MPyX\"\u003e distinctive 11.03 gram NWA 17754 evolved basaltic Martian Shergottite meteorite specimen.\u003c\/span\u003e This stunning Martian meteorite specimen beautifully displays the interior mineral and glass structure, as well as the exterior fusion crust. \u003cmeta charset=\"utf-8\"\u003eThe two major phases in this Martian meteorite are pigeonite (~ \u003cmeta charset=\"utf-8\"\u003e60 vol%) with the remaining ~30 vol% composed of \u003cem\u003emaskelynite\u003c\/em\u003e. Technically not a mineral, maskelynite is a diapplectic impact \"glass\" created when plagioclase is subjected to intense shock. Glass is typically created when a silicate liquid is cooled (quenched) so fast it does not have time to form a crystal mineral, locking the internal atomic structure into a disorganized \"amorphous\" configuration commonly referred to as glass. This is not the case with maskelynite. With maskelynite, plagioclase with a perfectly normal well formed crystal structure is shocked into a disorganized state and made into the amorphous \"diapplectic\" glass maskelynite without ever melting it. So, when this specimen was still attached to the Martian surface it was ~60 vol% pigeonite (pyroxene) and ~30 vol% plagioclase (labradorite), with the plagioclase being converted to the diapplectic glass maskelynite during the impact event that ejected it from the surface of Mars. Other ubiquitous minor phases (~10 vol%) in this Martian meteorite are titanomagnetite, ilmenite, and troilite. This martian meteorite specimen was ejected by an intense impact on the surface of Mars with sufficient force to send it hurtling out of Mars' gravity well, and by some miracle of orbital dynamics and gravitational perturbations ultimately to collide with Earth.\u003cbr\u003e\u003cbr\u003eThe data from the stable oxygen isotope analysis for this Martian meteorite plot starts nicely on the Martian fractionation line (MFL) with other established Martian shergottites and nakhlites and then starts to trend slightly down and to the right of the MFL. See orange X's in the oxygen isotope plot from the Meteoritical Bulletin below.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1185\/2762\/files\/NWA17754_oxygen_plot.png?v=1792714683\" alt=\"\"\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWhat you get:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e11.03 gram \u003cmeta charset=\"utf-8\"\u003eNWA 17754 Martian meteorite specimen as shown, membrane display\/storage box, and signed Certificate of Authenticity. \u003c\/div\u003e\n\u003cdiv\u003eWe offer a 100% no questions asked 30 day return policy.  \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eSEE EXCERPTS FROM OFFICIAL METEORITICAL SOCIETY ENTRY BELOW\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ch1 style=\"text-align: center;\"\u003eNorthwest Africa 17754\u003c\/h1\u003e\n\u003cdiv class=\"alert\"\u003e\n\u003cp\u003e\u003cstrong\u003eStatus: \u003c\/strong\u003eOfficial\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"container mb-4\"\u003e\n\u003ctable class=\"text-table th-left\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"row\"\u003e\n\u003cth class=\"col-12 col-md-3 col-lg-2\"\u003eBasic information\u003c\/th\u003e\n\u003ctd class=\"col-12 col-md-9 col-lg-10\"\u003e\n\u003cp\u003e\u003cstrong\u003eName:\u003c\/strong\u003e Northwest Africa 17754 \u003c\/p\u003e\n\u003cp\u003eThis is an OFFICIAL meteorite name.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbbreviation:\u003c\/strong\u003e NWA 17754\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eObserved fall: \u003c\/strong\u003eNo\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYear found: \u003c\/strong\u003e2025\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCountry: \u003c\/strong\u003eAlgeria\u003c\/p\u003e\n\u003cp\u003e\u003cstrong style=\"text-align: center; font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eMass: \u003c\/strong\u003e\u003cspan style=\"text-align: center; font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e2.51 kg\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"row\"\u003e\n\u003cth class=\"col-12 col-md-3 col-lg-2\"\u003eClassification history:\u003c\/th\u003e\n\u003ctd class=\"col-12 col-md-9 col-lg-10\"\u003e\n\u003cp\u003e\u003cstrong\u003eMeteoritical Bulletin, \u003ca href=\"https:\/\/doi.org\/10.1111\/maps.70157\" title=\"Gattacceca J., Grossman J. N., Weisberg M. M., Greshake A., Almeida N. V., Cartier C., Friedrich J. M., Goodrich C., Joy K. H., Schönbächler M., Schrader D. L., Yabuta H. and Zhang B. (2026) The Meteoritical Bulletin, No. 114. Meteoritics \u0026amp; Planetary Science 61, 942–946.\"\u003eMB 114\u003c\/a\u003e (2026): \u003c\/strong\u003eMartian (shergottite)\u003cbr\u003e\u003cstrong\u003eRecommended:\u003c\/strong\u003e Martian (shergottite)   \u003cbr\u003e\u003cbr\u003eThis is 1 of 372 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"row\"\u003e\n\u003cth class=\"col-12 col-md-3 col-lg-2\"\u003eComments:\u003c\/th\u003e\n\u003ctd class=\"col-12 col-md-9 col-lg-10\"\u003eApproved 5 Dec 2025\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"row\"\u003e\n\u003cth class=\"col-12 col-md-3 col-lg-2\"\u003eWriteup \u003c\/th\u003e\n\u003ctd class=\"col-12 col-md-9 col-lg-10\" id=\"writeups\"\u003eWriteup from \u003ca href=\"https:\/\/doi.org\/10.1111\/maps.70157\"\u003eMB 114:\u003c\/a\u003e\u003cbr\u003e\n\u003cdiv class=\"writeup\"\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003eNorthwest Africa 17754\u003c\/strong\u003e (NWA 17754)\u003c\/p\u003e\n\u003cp class=\"MBIndent\"\u003eAlgeria\u003c\/p\u003e\n\u003cp class=\"MBIndent\"\u003ePurchased: 2025\u003c\/p\u003e\n\u003cp class=\"MBIndent\"\u003e\u003cstrong\u003eClassification:\u003c\/strong\u003e Martian meteorite (Shergottite)\u003c\/p\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003eHistory\u003c\/strong\u003e: Purchased by Ali Fettouh from a meteorite dealer in Ouargla, Algeria, May 4, 2025.\u003c\/p\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003ePhysical characteristics\u003c\/strong\u003e: Four pieces, 1038, 926, 207, and 132 g, and many small fragments. Fusion crusted, freshly broken surface reveals gray-green pyroxene crystals and spectacularly shiny maskelynite. Friable.\u003c\/p\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003ePetrography\u003c\/strong\u003e: (C. Agee, \u003cem\u003eUNM\u003c\/em\u003e) Electron microprobe analysis and reflected light microscopy of a polished mount show this meteorite to be a basaltic shergottite. The two major phases in this meteorite are clinopyroxene and maskelynite. Ubiquitous minor phases are titanomagnetite, ilmenite, and troilite. The clinopyroxene has a modal abundance of approximately 60%, with significant core to rim zoning indicating an igneous crystallization trend with Mg-rich pigeonite cores, mantled by augite, and rimmed with ferropigeonite. Clinopyroxene average grain sizes are approximately 300-500 μm. Maskelynite has modal abundances of approximately 30%, and most grains are irregular shaped to equant and 100-300 μm in size.\u003c\/p\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003eGeochemistry\u003c\/strong\u003e: (M. Spilde, \u003cem\u003eUNM\u003c\/em\u003e) Clinopyroxene Fs\u003csub\u003e39.8±12.3\u003c\/sub\u003eWo\u003csub\u003e18.9±9.6\u003c\/sub\u003e, Fe\/Mn=32±4, n=7; plagioclase An\u003csub\u003e51.0±3.4\u003c\/sub\u003eAb\u003csub\u003e47.5±3.7\u003c\/sub\u003e, n=5. Oxygen isotopes (K. Ziegler, \u003cem\u003eUNM\u003c\/em\u003e): 7 acid-washed fragments analyzed by laser fluorination gave δ\u003csup\u003e18\u003c\/sup\u003eO=5.586, 5.044, 5.254, 5.104, 5.670, 5.867, 5.251; δ\u003csup\u003e17\u003c\/sup\u003eO= 3.161, 2.913, 3.029, 2.956, 3.212, 3.301, 3.008; Δ\u003csup\u003e17\u003c\/sup\u003eO= 0.211, 0.249, 0.255, 0.261, 0.218, 0.203, 0.236 (linearized, all per mil, TFL slope=0.528).\u003c\/p\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003eClassification\u003c\/strong\u003e: Evolved basaltic shergottite. The oxygen isotopic composition has a trend slightly off the Martian fractionation line.\u003c\/p\u003e\n\u003cp class=\"MBNormal\"\u003e\u003cstrong\u003eSpecimens\u003c\/strong\u003e: 20 g plus a probe mount on deposit at \u003cem\u003eUNM\u003c\/em\u003e, Ali Fettouh holds the main mass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"row\"\u003e\n\u003cth class=\"col-12 col-md-3 col-lg-2\"\u003eData from: \u003ca href=\"https:\/\/doi.org\/10.1111\/maps.70157\"\u003eMB114\u003c\/a\u003e\u003cbr\u003eTable 0 Line 0:\u003c\/th\u003e\n\u003ctd class=\"col-12 col-md-9 col-lg-10\"\u003e\n\u003cstrong\u003ePlace of purchase:\u003c\/strong\u003e Ouargla, Algeria\u003cbr\u003e\u003cstrong\u003eDate:\u003c\/strong\u003e P 2025\u003cbr\u003e\u003cstrong\u003eMass (g):\u003c\/strong\u003e 2510\u003cbr\u003e\u003cstrong\u003ePieces:\u003c\/strong\u003e 4\u003cbr\u003e\u003cstrong\u003eClass:\u003c\/strong\u003e Martian (shergottite)\u003cbr\u003e\u003cstrong\u003eShock stage:\u003c\/strong\u003e high\u003cbr\u003e\u003cstrong\u003eWeathering grade:\u003c\/strong\u003e low\u003cbr\u003e\u003cstrong\u003eFerrosilite (mol%):\u003c\/strong\u003e 39.8±12.3\u003cbr\u003e\u003cstrong\u003eWollastonite (mol%):\u003c\/strong\u003e 18.9±9.6\u003cbr\u003e\u003cstrong\u003eClassifier:\u003c\/strong\u003e C. Agee, UNM\u003cbr\u003e\u003cstrong\u003eType spec mass (g):\u003c\/strong\u003e 21\u003cbr\u003e\u003cstrong\u003eType spec location:\u003c\/strong\u003e UNM\u003cbr\u003e\u003cstrong\u003eMain mass:\u003c\/strong\u003e Ali Fettouh\u003cbr\u003e\u003cstrong\u003eComments:\u003c\/strong\u003e Fieldname ZF-3000; submitted by C. Agee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Top Meteorite","offers":[{"title":"Default Title","offer_id":51131053179105,"sku":"NWA17754EC26_11.03_01","price":3127.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1185\/2762\/files\/Martian-Mars-Meteorite-Top-NWA-NWA17754-17754_NWA17754EC26_11.03_01_8.jpg?v=1792698926","url":"https:\/\/topmeteorite.com\/en-ca\/products\/11-03g-martian-shergottite-olivine-phyric-meteorite","provider":"Top Meteorite","version":"1.0","type":"link"}