Walking through the exhibits at the GSA Annual Meeting in Denver last week, I experienced a sudden intake of breath upon seeing this specimen at the Kansas State University table. It was a big-ol' chunk of kimberlite, something one never expects to see in the wild. Among the many other geological attractions of Kansas is a kimberlite body right there in Riley County. The only thing it lacks is diamonds, but I was OK with that. In fact, now I want to visit KSU in Manhattan and see some of its other attractions, like its gardens. And between Manhattan's brewpub, the Baking Hall of Fame and the nearby Tallgrass Prairie National Preserve, I think I'd have a good time.
See a closeup of this fine rock, with more information, in the Igneous Rock Types gallery.