Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
Granophyre is a type of granitic rock which consists of intergrown feldspar and quartz crystals in a medium to fine grained groundmass
History
Origin
USA
-
Discoverer
Unknown
Unknown
Etymology
From 17th century, because of its greasy feel and use like a soap
From German Granophyr, from Granit granite + Porphyr
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
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock