Definition
Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
History
Origin
Brazil
New Zealand
Discoverer
Unknown
Ferdinand von Hochstetter
Etymology
from French néphéline, from Greek nephelē
From the name of Dun Mountain, New Zealand, + -ite1
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock