NWA 18178 ( 30,230 g )

Northwest Africa 18178 (NWA 18178)
(Northwest Africa)
Purchased: 2025 Oct
Classification: Ordinary chondrite (H5, melt breccia)
History: The meteorite was purchased from a Moroccan dealer at the Munich Mineral Show 2025.
Physical characteristics: Dark brownish rock partly covered with fusion crust.
Petrography: Chondritic melt breccia composed of H5 clasts (plagioclase grain size about 20 µm) with partly flattened and packed chondrules (apparent mean diameter of about 0.4 mm) set in abundant finely recrystallized shock melt containing FeNi metal and sulfide spherules. Some several mm wide metal veins are present.
 
Place of purchase:
Munich, Germany
Date:
P 2025 Oct
Mass (g):
575
Pieces:
1
Class:
H5-melt breccia
Shock stage:
S2
Weathering grade:
W1
Fayalite (mol%):
18.4±0.1 (n=5)
Ferrosilite (mol%):
16.0±0.2 (n=5)
Wollastonite (mol%):
1.4±0.1 (n=5)
Classifier:
A. Greshake, MNB
Type spec mass (g):
21.4
Type spec location:
MNB
Main mass:
Hanno Strufe
Comments:
Submitted by Ansgar Greshake