IRON
Specimen iro-9
$ 20.00Dims: 1.5" x 0.9" x 0.1"(3.8 x 2.3 x 0.2 cm)
Wt: 13.5 g
Gibbeon, Hoba, Namibia
This thin tablet was cut from a siderolite, a metallic meteorite that has stony inclusions; the inclusions are sphericles of a substance that is made up mostly of carbon. The specimen is long, flat, rectangular in shape, and has been cut on all sides. The faces have been polished and then etched with acid, bringing out a design of intersecting lines in the material that are called Widmanstatten figures. These lines occur due to the presence of two slightly different iron-nickel compounds present in the meteorite called kamacite and taenite. As the molten mass cools, these compounds align themselves in certain directions as they crystallize.