Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
An iron rich extrusive rock found as a member of the alkali basalt magma series
History
Origin
USA
Isle of Mull, Scotland
Discoverer
Unknown
Ben More
Etymology
From 17th century, because of its greasy feel and use like a soap
From the name of discoverer, Ben More
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock