This two inch long slice was a gift from Hanno Strufe who owns one kilogram of this material with Ismaily Sidi Mohamed. Of course I immediately sent it to be thin sectioned.
NWA 13937 is a lunar feldspathic breccia. Dr. Ansgar Greshake describes it as predominantly composed of lithic and mineral clasts in partly shock melted and vesicular matrix. In this case the melt is intimately mingled with non-melted mineral grains and clasts. It is a frozen slurry.