This attractive HED Achondrite (Diogenite) NWA 7831 was found at Saguia el Hamra, Western Sahara, on 3rd March 2013. It was discovered buried in the ground near Chouichiyat and excavated by local villagers.
A Single large mass of at least 20kg was recovered, composed of yellow-green crystalline material with pale orange weathering products along numerous fractures. The meteorite disintegrated into thousands of smallish fragments during excavation.
This interesting Diogenite is composed almost entirely of translucent yellow-green orthopyroxene with very sparse, tiny grains of Ni-free metal, troilite, chromite, anorthite, silica polymorph and clinopyroxene, secondly pale orange, clay-like deposits.SIMILAR TO SEEN: The image shows an example of the single specimen you will receive. This will be picked from our stock box graded and with a size within the minimum and maximum size range indicated. It will not be the exact specimen in the photo, the colours, shape, size and style may vary as with any natural item. To guarantee the specimen you receive will be representative by that in photo, we would always recommend the Actual as seen version of this item.