NWA 12333 Meteorite - R5 (rumurutite) Chondrite - 0. 91g Endcut
Item History & Price
Reference Number: Avaluer:4410464 | Modified Item: No |
Sahara
R5 chondrite
found in 2017
0.91 gram endcut sold with label/certificate of authenticity(1.4 x 1 x 0.4 cm)
I combine shipment
History: Purchased in Erfoud by Pierre-Marie Pelé.
Physical characteristics: Dark stone, partially covered with fusion crust. Cut surface reveals dark interior with small chondrules.
Petrography: Highly recrystallized chondrite with average size plagioclase below 50 μm. Abundant sulfide. Accessory magneti...te.
Geochemistry: Olivine Fa39.6±0.4, range Fa39.1-40.1, Cr2O3 in ferroan olivine is 0.0±0.1 wt%, NiO2=0.22±0.20 wt% (n=3). High-Ca pyroxene Fs29.6Wo68.7 (n=1). Chromite Cr#=0.85 (n=1).
Classification: Rumuruti chondrite (R5).
R chondrite: The Rumuruti (R) group of chondrites does not clearly belong to any of the major classes of chondrites (ordinary, carbonaceous, enstatite); R chondrites have sub-solar Mg/Si and refractory/Si ratios, oxygen isotope compositions that plot above the terrestrial fractionation line and ordinary chondrites, and highly oxidized mineralogy.
type 5: Designates chondrites that have been metamorphosed under conditions sufficient to homogenize olivine and pyroxene, convert all low-Ca pyroxene to orthopyroxene, cause the growth of various secondary minerals, and blur chondrule outlines.
The meteorite is sold in a box and with a separate label / signed certificate of authenticity.
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