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Meteorite. The 60- tonne, 2.7 m-long (8.9 ft) Hoba meteorite in Namibia is the largest known intact meteorite. [1] A meteorite is a rock that originated in outer space and has fallen to the surface of a planet or moon. When the original object enters the atmosphere, various factors such as friction, pressure, and chemical interactions with the ...
the Uwet meteorite of Cross River State, Nigeria. the Sikhote-Alin meteorite, Sikhote-Alin Mountains, Russia. the Hex River Mountains meteorite from the Cape Winelands District, Western Cape Province, South Africa. the Canyon Diablo meteorite of Meteor Crater, Coconino County, Arizona, United States. the Smithonia meteorite of Oglethorpe County ...
Vickers hardness test was applied to a number of kamacite samples and shocked meteorites were found to have values of 160–170 kg/mm and non-shocked meteorites can have values as high as 244 kg/mm. [7] Shock causes a unique iron transformation structure that is able to be measured using metallographic and X-ray diffraction techniques. After ...
That’s over $15,000 per pound! Pieces of Mars rock can command similar prices, with a 4.25-pound piece selling for $63,000, approximately $15,000 per pound. Meteorites from the Moon are even ...
Pallasite. A slice of the Esquel pallasite, clearly showing the large olivine crystals suspended in the metal matrix. The pallasites are a class of stony–iron meteorite. They are relatively rare, and can be distinguished by the presence of large olivine crystal inclusions in the ferro-nickel matrix.
Tektite. Two splash-form tektites, molten terrestrial ejecta from a meteorite impact. Tektites (from Ancient Greek τηκτός (tēktós) 'molten') are gravel -sized bodies composed of black, green, brown or grey natural glass formed from terrestrial debris ejected during meteorite impacts. The term was coined by Austrian geologist Franz ...
Chinguetti mesosiderite. Mesosiderites are a class of stony–iron meteorites consisting of about equal parts of metallic nickel-iron and silicate. They are breccias with an irregular texture; silicates and metal occur often in lumps or pebbles as well as in fine-grained intergrowths. The silicate part contains olivine, pyroxenes, and Ca-rich ...
Polished and etched surface of the Mundrabilla meteorite from Australia. The darker brownish areas with striations are troilite with exolved daubréelite. Troilite (IPA: //ˈtɹɔɪlaɪt//) is a rare iron sulfide mineral with the simple formula of FeS. It is the iron-rich endmember of the pyrrhotite group. Pyrrhotite has the formula Fe (1-x) S ...