Octahedrites are the most common structural class of iron meteorites. The structures occur because the meteoric iron has a certain nickel concentration that leads to the exsolution (when a solid solution becomes unstable) of kamacite out of taenite while cooling. Due to a long cooling time in the interior of the parent asteroids, these alloys have crystallized into intermixed millimeter-sized bands (from about 0.2 mm to 5 cm). When polished and acid etched the classic Widmanstätten patterns of intersecting lines of lamellar kamacite, are visible. In gaps between the kamacite and taenite lamellae, a fine-grained mixture called plessite is often found. Graphite and troilite occur in rounded nodules up to several centimeters in size. Offered here is a 3x5.5x2-3/8" tall coarse iron octahedrite meteorite that weighs 1,533.10 grams. This meteorite fell in Canyon Diablo ("The Devil's Canyon") in Coconino County in Northern Arizona. Canyon Diablo is the most famous American meteorite impact and the best preserved meteorite crater on Earth. The Canyon Diablo meteorite comprises many fragments of the asteroid that impacted at Barringer Crater (Meteor Crater) in Arizona 50,000 years ago. Meteorites have been found around the crater rim, and are named for nearby Canyon Diablo, which lies about three to four miles west of the crater. Meteorite has 1.5x2.25x.5" deep scoop which opens into smaller .75x.75" scoop on opposite side, most probably created by the ejection of a graphite nodule. Scoops and recessed areas have some oxidation, a natural occurrence given the high iron composition of this meteorite and its thousands of years of weathering. Makes for an out-of-this-world display. From the Robert M. Overstreet Collection and comes with COA.