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23 gram oriented button.   Iron, ungrouped

TKW 75.3 kg. Fall not observed. Found 2001 in Northwest Africa.
 

Steve writes:

A rare ungrouped desert iron, this nickel-rich plessitic octahedrite was originally classified as NWA 859; it was subsequently given the name Taza when it was later reported to have been found near that Moroccan village in 2001.

Depending on the condition when found, unweathered examples can display a caramel-colored patina not unlike Gebel Kamil, though some rare finds retain the original blue-gray fusion crust often associated with many early Sikhote-Alin individuals. Other examples from this approximately 100 kg fall are quite oxidized, with the majority of finds being less than 20 grams. And like Sikhote-Alin, smaller pieces often take on shrapnel-like shapes, while much larger examples can exhibit classic regmaglypts.

This 23.0 gram oriented, nearly perfect “button” has been cleaned, but it still retains several nice features: deep flow lines (Photos 1 through 3 on a 1 cm cube); a distinct primary rollover lip with a wider secondary one (Photo 4); and plessitic “needles” visible in its ablated leading edge (Photo 5). Besides the standard images, I’ve also included two 3D crossed-eyes ones and their corresponding red-cyan anaglyphs (Photos 6 through 9).



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