Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
History
Origin
USA
Hawaii Islands
Discoverer
Unknown
Unknown
Etymology
From 17th century, because of its greasy feel and use like a soap
From Greek pikros bitter + -ite, 19th century
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, Opaque Rock