NWA 8720 (R4) SOLD OUT

A 77.08g mostly crusted stone was purchased out of Morocco in October of 2014. I prepared the slices and classification was done by Dr. Alan Rubin and John Breen (student) who determined the stone to be a R4 Rumuruti Chondrite with a shock and weathering grade of 2. Slices feature multicolored chondrules and inclusions scattered within a light brown matrix. The slices were only slightly polished to preserve the wonderful chondrules from blending in to the matrix. Each will come in a quality labeled meteorite display box.

Petrography as follows:
Microprobe examination of a polished mount shows low-Ca pyroxene exhibits only minor polysynthetic twinning. Small grains of pyrrhotite are present. The rock is moderately recrystallized, consistent with type 4. The mean olivine Fa content indicates that it is an R chondrite. Mean chondrule size is ~400 µm, also consistent with R. Olivine: Fa 38.5±0.3 (n=16); low-Ca pyroxene: Fs23.4±5.4 Wo1.0±0.6 (n=10); Ca-pyroxene: Fs9.5 Wo46.3 (n=2). Direct link to Meteoritical Bulletin here.

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