Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
A yellow sandstone which is flexible when cut into thin strips
History
Origin
USA
-
Discoverer
Unknown
Unknown
Etymology
From 17th century, because of its greasy feel and use like a soap
From the name of a mountain range where it was found; Itacolumi mountain in Brazil
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock