Ouzina (R4) – 20.3g

1,295.00$

1 in stock

Description

R4 chondrite

20.3g individual
Sold with label/certificate of authenticity

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30°48’N, 4°11’W
Found in april 1999 near the algerian border.
R4 chondrite (Rumurutite)
Total mass : 642 g

A 642 g stone was found by a Bedouin. Classification and mineralogy (M. Killgore, SWML; A. Rubin, UCLA): chondrules (0.4 to 1 mm) well-defined, but matrix and chondrule mesostasis recrystallized; barred olivine and porphyritic chondrules abundant; average olivine, Fa40.1, with 0.18 wt% NiO; shock stage, S2; weathering grade, W4.