Stone meteorites type R – Stenmeteoritter type R
Rumuruti – R-type chondrite
The R chondrites are quite different from ordinary chondrites and they are the opposite of the E chondrites when it comes to mineralogy and their state of oxidation. The members of this group are highly oxidized, containing high amounts of iron-rich olivine. There is practically no free metal inside the R chondrites since most of the iron is either oxidized or found in the form of iron sulfides. The iron-rich olivines, along with the oxidized nature of the iron, give most R chondrites a typical red appearance.There are just about 30 R chondrites known if we exclude all probable pairings, especially from the hot deserts of Northwest Africa (NWA).
NEWLY CLASSIFIED NWA 13727
This is 1 of 17 approved meteorites classified as R3-5.
Breccia composed of discrete well-delineated chondrules plus lithic clasts in a fine grained matrix. Both unequilibrated and equilibrated chondrules are present. Some lithic clasts (Type 5) consist of sparse chondrules in a recrystallized matrix, whereas others consist of separated chondrules in an opaque matrix. Accessory minerals include sodic plagioclase (in the matrix), pyrrhotite, pentlandite, Ti-chromite, merrillite and Cr-magnetite; metal is absent and much of the sulfide is stained orange from secondary alteration.
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#57010 – 4.0g €48,- kr. 360,-
#57011 – 5.1g €61,- kr. 459,-
#57012 – 4.8g €57,- kr. 432,-
#57013 – 3.4g €41,- kr. 306,-
#57014 – 2.2g €26,- kr. 198,-
#57015 – 1.6g €19,- kr. 144,-
R-type Rumuruti – rare – 307,6 g sold
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