21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g
21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g 21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g

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21266 - Huge Almost Complete NWA Enstatite Chondrite Meteorite 5105g

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Species
NWA Unclassified Enstatite Chondrite - Meteorite
Age
-
Location
Fell in Occidental Sahara Desert, Morocco, Northwest Africa
Formation
Medium-sized Asteroids (Jupiter-Mars Asteroids belt)
Size
155.8 mm   •    in
Weight
5105 g   •    oz
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Description
These meteorites were found in the Saharan Desert in Northwest Africa, likely by nomads. In order to classify them it would be necessary to cut off a section for analysis. 

This specimen is 100% guaranteed to be a stony meteorite of the general class " chondrite" and almost certainly of the class "enstatite chondrite".

All our specimens, of the same type, have been analyzed by our fellow researchers from the Applied Petrology Loboratory of the University of Alicante (Environment and Earth Sciences Department).

Enstatite chondrites (also known as E-type chondrites) are a rare form of meteorite thought to comprise only about 2% of the chondrites that fall on Earth.

 

Unlike most other chondrites, the minerals in enstatite chondrites contain almost no iron oxide; they are the most oxygen-poor silicate rocks known. They are also the driest objects in the solar system, consisting of only 0.01% water. Metallic Fe-Ni (iron-nickel) and Fe-bearing sulfide minerals contain nearly all of the iron in this type of meteorite. Enstatite chondrites contain a variety of unusual minerals that can only form in extremely reducing conditions, including oldhamite (CaS), niningerite (MgS), perryite (Fe-Ni silicide), and alkali sulfides (e.g., djerfisherite and caswellsilverite). All enstatite chondrites are dominantly composed of enstatite-rich chondrules plus abundant grains of metal and sulfide minerals. Dusty matrix material is uncommon and refractory inclusions are very rare. Chemically, enstatite chondrites are very low in refractory lithophile elements. Their oxygen isotopic compositions are intermediate between ordinary and carbonaceous chondrites, and are similar to rocks found on the Earth and Moon. Their lack of oxygen content may mean that they were originally formed near the center of the solar nebula that created the solar system, possibly within the orbit of Mercury. Most enstatite chondrites have experienced thermal metamorphism on the parent asteroids. They are divided into two groups:

EH (high enstatite) chondrites contain small chondrules (~0.2 millimetres (0.0079 in)) and high ratios of siderophile elements to silicon. Somewhat more than 10% of the rock is composed of metal grains. A diagnostic feature of EH chondrites is that the Fe-Ni metal contains ~3 wt% elemental silicon.
EL (low enstatite) chondrites contain larger chondrules (>0.5 millimetres (0.020 in)), and low ratios of siderophile elements to silicon. Fe-Ni metal contains ~1 wt% Silicon.
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This is a unique item. A physical certificate of authenticity will be provided. The certificate, elaborated individually by an expert paleontologist, contains an accurate scientific description and the certificate validity can be verified online at all times. In addition, a 100% money back guarantee is provided. Learn more.

 

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