Mesosiderite Meteorite (NWA 18216) No reserve price. - 6.22 g - (1)
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Mesosiderite meteorite from Northwest Africa 18216 (Nouadhibou, Mauritania), originating in Northwest Africa.
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Description from the seller
Northwest Africa 18216 (NWA 18216)
Mauritania
Purchased: 2025
Classification: Mesosiderite
History: The material was purchased in Nouadhibou, Mauritania, in 2025 by Mohamed Ali Loud from a meteorite dealer.
Physical characteristics: Several dark brownish rocks lacking fusion crust.
Petrography: The meteorite displays a dark brownish interior and is composed of silicate (about 65 vol%) and metallic (about 35 vol%) portions. The silica fraction predominantly consists of up to 5 mm sized low-Ca pyroxene and calcic plagioclase. Many pyroxenes contain blebby and lamellar augite exsolutions. Metal is partly altered and mostly kamacite with less abundant taenite. Minor phases include silica, troilite, chromite, and merrillite.
Geochemistry: low-Ca pyroxene: Fs33.5±0.2Wo3.3±0.3 (Fs33.1-33.9Wo2.7-3.6, FeO/MnO=22-25, n=7); Ca-pyroxene exsolutions: Fs15.7±0.7Wo41.9±1.3 (Fs15.1-16.9Wo39.8-43.0, FeO/MnO=19-21, n=7); calcic plagioclase: An91.3±1.2 (An90.1-93.2, n=7)
Shock stage: low
Weathering grade: moderate
Classifier: A. Greshake, MNB
This lot comes with a certificate of authenticity.
Thanks for your interest.
Northwest Africa 18216 (NWA 18216)
Mauritania
Purchased: 2025
Classification: Mesosiderite
History: The material was purchased in Nouadhibou, Mauritania, in 2025 by Mohamed Ali Loud from a meteorite dealer.
Physical characteristics: Several dark brownish rocks lacking fusion crust.
Petrography: The meteorite displays a dark brownish interior and is composed of silicate (about 65 vol%) and metallic (about 35 vol%) portions. The silica fraction predominantly consists of up to 5 mm sized low-Ca pyroxene and calcic plagioclase. Many pyroxenes contain blebby and lamellar augite exsolutions. Metal is partly altered and mostly kamacite with less abundant taenite. Minor phases include silica, troilite, chromite, and merrillite.
Geochemistry: low-Ca pyroxene: Fs33.5±0.2Wo3.3±0.3 (Fs33.1-33.9Wo2.7-3.6, FeO/MnO=22-25, n=7); Ca-pyroxene exsolutions: Fs15.7±0.7Wo41.9±1.3 (Fs15.1-16.9Wo39.8-43.0, FeO/MnO=19-21, n=7); calcic plagioclase: An91.3±1.2 (An90.1-93.2, n=7)
Shock stage: low
Weathering grade: moderate
Classifier: A. Greshake, MNB
This lot comes with a certificate of authenticity.
Thanks for your interest.
Details
Number of items
1
Name of meteorite
Mesosiderite Meteorite
Type of meteorite
(NWA 18216) No reserve price.
Weight
6.22 g
Country of Origin
NWA
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