Ancient Lunar Troctolite — NWA 16372 End Cut

Lunar troctolite meteorite, end cut with a glossy polish, one of only 13 found. "Anorthosites, rocks composed almost entirely of plagioclase feldspar, are the oldest rocks on the Moon. They appear to have formed when feldspar crystallized and floated to the top of a global magma ocean that surrounded the Moon soon after it formed." (PSRD Hawaii)

From the analysis in the Met Bull, "this meteorite is a brecciated anorthositic troctolite with plagioclase (~90%), olivine (~5%), and augite (~1%), and minor amounts of taenite, kamacite, and troilite."