Iron Meteorite — 1CNorth Yilgarn, Western Australia

In this softly triangular complete slice, large metallic grains of kamacite and taenite appear interwoven in a complex array specific to the IC chemical group, the smallest group of iron meteorites. The meteorite is circumscribed by the winding edge of the meteorite’s exterior surface. Neumann bands and large silicate inclusions are in evidence in this select example. Modern cutting.
151 x 261 x 3 mm. (6 x 10¼ x ⅛ in.) and 639 g. (1½ lbs)

Exotic meteorite slice with an abstract appearance to matrix. In a remote, largely inaccessible region in the southwest edge of Australia, the Mount Dooling meteorite was first discovered in 1909 by gold prospector A.P. Brophy. In this select example, large metallic grains appear interwoven in a complex array specific to the IC chemical group. The smallest group of iron meteorites, the IC group contains only eight members. Because different iron meteorites have different compositions and cooled at different rates, they frequently exhibit distinctly different patterns—which are diagnostic in the identification of an iron meteorite. The latticework in evidence is indicative of a slow cooling rate that provided sufficient time—millions of years—for the meteorite’s elements to arrange themselves into their crystalline structure. At some point, after solidifying, Mount Dooling experienced a high-energy impact in interplanetary space; the iron sulfide nodules were melted and the kamacite grains developed shock-produced twin lamellae known as Neumann bands.

Christie's would like to thank Dr. Alan E. Rubin at the Institute of Geophysics and Planetary Physics, University of California, Los Angeles for his assistance in preparing this catalog note.