NWA 13309 LL3.15 Chondrite meteorite Found in September 2019 in Timbuktu Mali. 62.5 Grams. GUARANTEED AUTHENTICITY. You are buying 100% a guaranteed authentic meteorite combined with a signed authenticity certificate. Free worldwide shipping. First express class delivery and tracking will be provided. Official classification data source: Abbreviation: NWA 13309 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass:help 5.6 kg Classification This is 1 of 10 approved meteorites classified as LL3.15. Comments: Approved 13 Jun 2020 Writeuphelp Writeup from MB 109: Northwest Africa 13309 (NWA 13309) (Northwest Africa) Purchased: 2019 Sep Classification: Ordinary chondrite (LL3.15). Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, fairly closely packed, relatively unequilibrated, glass-bearing chondrules (apparent diameter 900 ± 560 µm, N = 23) plus some isolated mineral clasts are set in a sparse opaque matrix rich in kamacite, taenite and troilite. Geochemistry: Olivine (Fa16.2±8.3, range Fa0.6-26.9, N = 9; Cr2O3 in ferroan olivines 0.07-0.55 wt.%, mean 0.25±0.16 wt.%, N = 33), low-Ca pyroxene (Fs14.4±5.0Wo1.5±1.8, range Fs7.4-21.5Wo0.3-4.7, N = 5), subcalcic augite (Fs19.2Wo31.1), diopside (Fs1.2Wo44.5). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.51. Classification: Ordinary chondrite (LL3.15). Chondrule sizes and magnetic susceptibility support an LL rather than L class. Subtype based on Cr2O3 contents of ferroan olivines per Figure 15 of Grossman and Brearley (2005). Bibliography: Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link) Data from: MB109 Table 0 Line 0: Place of purchase: Timbuktu, Mali Date: P 2019 Sep Mass (g): 5602 Pieces: 6 Class: LL3.15 Shock stage: S2 Weathering grade: W1/2 Fayalite (mol%): 16.2±8.3 Ferrosilite (mol%): 14.4±5.0 Wollastonite (mol%): 1.5±1.8 Classifier: A. Irving, UWS, and P. Carpenter, WUSL Type spec mass (g): 38.2 Type spec location: UWB