This meteorite was discovered approximately 15 km east of the large dry riverbed Wadi Al-Namous (also known as Oued Namous) and about 10 km north of the N6B highway in the province of El Bayadh, Algeria, in May 2021.
Scientists have suggested that the angrites may represent ejecta from Mercury, but subsequent research has cast significant doubt on these claims.
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
Out of stock
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
Out of stock
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
NWA 15171 is a rare mesosiderite meteorite.
Mesosiderites are brecciated rocks containing silicate and metallic components, the silicates are mainly fragments of igneous rocks.
Writeup from MB 112:
Northwest Africa 15171 (NWA 15171)
Adrar, Algeria
Purchased: 2022
Classification: Mesosiderite
History: Bought by Jean Redelsperger from Mohamed Elguirah in 2022.
Physical characteristics: Many brown ireggular stones without fusion crust.
Petrography: (J. Gattacceca, CEREGE) The rock contains similar abundances of silicate minerals (pyroxene, and plagioclase), and metal and its weathering products. Silicate grain size is about 200 µm. Plagioclase and low-Ca pyroene dominate over Ca-pyroxene. Fe,Ni metal and troilite have been mostly replaced by terrestrial weathering products.
Geochemistry: Low-Ca pyroxene Fs31.4±2.0Wo3.8±0.2, range Fs29.5-35.9, FeO/MnO = 26.4±4.9 (n=7). Plagioclase An92.5±2.1Ab7.4±2.0Or0.1±0.1 (n=4).
Classification: Achondrite (mesosiderite)
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Out of stock
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Out of stock
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Out of stock
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Out of stock
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Out of stock
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.
Smara 004 is a fresh meteorite discovered in November 2025 by Mohamed Elmrani in Morocco near the village of Sidi Ahmed Laroussi.
This meteorite has been classified as an ungrouped C2, a rare type of very primitive carbonaceous meteorite.
To date, only 31 meteorites of this type have been discovered.
The total known mass of this meteorite is only 42 grams !
This meteorite is of the same type as the famous Tagish Lake meteorite.