Almahata Sitta is an historic meteorite in many ways. Discovered by a telescope near Tucson Arizona as it was still an asteroid on October 6, 2008. Fell in Northern Sudan as predicted on October 7. Found as thousand of fragments, by an expedition led by the University of Khartoum. Each and every one of those fragments is now being studied and analyzed by Prof. Andi Bischoff who has already found many different types of meteorites within that one single meteorite.

And here are thin-sections of 2 of the most prevalent types:
TS783 Fine grained ureilite covered $350.00
TS788 Fine grained ureilite covered $350.00
TS450 Enstatite EL6 covered $400.00