Troctolite meteorite rocks like that of NWA 8687 are coarse-grained
intrusive igneous rocks composed of almost entirely olivine and
feldspar. Troctolites are almost totally missing pyroxene which is the
case with this meteorite which has just 3% orthopyroxene. NWA 8687 Lunar
Troctolite has a low weathering grade and is highly shocked it may be a
monomictic breccia and is composed of fine-grained plagioclase,
This is a remarkable meteorite of a rare type and there is not much of it.