Nelsonite is a special type of intrusive igneous rocks,
comprising of ilmenite and apatite. They are reported essentially
from within norite-gabbro-anorthosite suites.
Nelsonite is a type of igneous rock that is high in olivine, a green mineral. It is often found in intrusive igneous formations, such as dikes and sills. Nelsonite is named after the locality where it was first described, near Nelson, Virginia, USA.