On Offer: 20.63g CR2 carbonaceous chondrite specimen
Description: 20.63 gram NWA 1180 CR2 carbonaceous chondrite meteorite specimen with crust on one side and cut on two sides to expose an amazing display of large well formed chondrules. The petrologic designation of 2, indicates that this meteorite has been aqueously altered (by water) on its parent body prior to landing on Earth. This is evidenced by the presence of phyllosilicates (clays), created from olivine and pyroxene altered by interaction with water.
Official Name: NWA 1180
Type: Carbonaceous Chondrite - CR2
Observed fall: No
Year fell: 2000
Country: Northwest Africa
What you get: 20.63g NWA 1180 CR2 Carbonaceous Chondrite specimen as shown, Membrane Storage/Display Box, and signed Certificate of Authenticity.
I offer a 100% no questions asked 30 day .
Writeup from MB 86:
Northwest Africa 1180
Morocco
Found 2000
Carbonaceous chondrite (CR2)
Eight fully to mostly crusted stones, weighing a total of 1705 g, were purchased in Rissani (2001). The local finders say that these stones defined a strewnfield ~1.5 km long and within a few kilometers of Zagora. Classification and mineralogy (T. Bunch and J. Wittke, NAU): chondrules account for 63 vol%; small chondrules (<1.5 mm) tend to be round and metal-poor, large chondrules (<4.0 mm) are mostly irregular-shaped with abundant metal (kamacite = 5.2 6.0 wt% Ni). Olivine, Fa 1.3 2.1; orthopyroxene, Fs 2.2 3.2Wo 0.8; plagioclase, An 95 97; pyrrhotite (Ni = 1.4 wt%); phyllosilicates, serpentine-greenalite series (Mg > Fe); chondrule and matrix glasses are Mg, Al-rich, Na, K-poor; fine-grained (<0.05 mm) refractory inclusions contain diopside (Wo 49 52, Fs 1), spinel (FeO = 0.25 wt%), and gehlenite. Shock stage, S1; weathering grade, W2. Specimens: type specimen, 19.7 g and one thin section, NAU; main mass is with the purchaser.
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