The image below shows the repository piece of the CV3 carbonaceous chondrite in which the ASU team of A. Bouvier and M. Wadhwa found the oldest known material in the solar system (4.568 billion years). This CV3 chondrite contains the typical collection of chondrules, calcium-aluminum inclisions (CAIs), fragments, and fine-grained matrix known in CV3 meteorites, in addition to probable carbonaceous compounds and interstellar nanodiamonds. NWA is moderately weathered and shocked with a total known weight of 1493 g. The scientific abstract of the ASU team's work is located at http://www.nature.com/ngeo/journal/vaop/ncurrent/abs/ngeo941.html. A layman's description of this research is available at the Science Daily site.
CV3 chondrites are a meteorite class named after the Vigarano meteorite that fell in Italy in 1910 and closely resemble ordinary chondrites. CV3s have abundant large, well-defined chondrules of magnesium-rich olivine (>0.7 mm diameter; 40-65 vol. %), often surrounded by Fe sulfide. They also contain 7-20 vol. % CAIs. The dark-gray matrix is dominated by Fe-rich olivine (~60 vol. %). The Allende meteorite is a very famous and well-studied CV meteorite. As of August 2010, 176 CV3 meteorites are known of the ~52,000 recovered meteorites on Earth.