Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Harzburgite is a plutonic rock of the peridotite group consisting largely of orthopyroxene and olivine
History
Origin
Hawaii Islands
Germany
Discoverer
Unknown
Unknown
Etymology
From Greek pikros bitter + -ite, 19th century
From the name of a town in Harzburg, Germany
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock