Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
History
Origin
USA
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
From 17th century, because of its greasy feel and use like a soap
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
-
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock