Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
USA
Germany
Discoverer
Unknown
Christian Leopold von Buch
Etymology
From 17th century, because of its greasy feel and use like a soap
From Greek di + base
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock