Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
USA
Tamil Nadu, India
Discoverer
Unknown
T. H. Holland
Etymology
From 17th century, because of its greasy feel and use like a soap
From Job Charnock, an administtrator of East India Company
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock