Definition
Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
Jadeitite is a metamorphic rock usually found in blueschist grade metamorphic terrains
History
Origin
Brazil
-
Discoverer
Unknown
Unknown
Etymology
from French néphéline, from Greek nephelē
From pyroxene mineral jadeite
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock