Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock, which sometimes contains diamonds and is mostly found in South Africa and Siberia.
History
Origin
Hawaii Islands
Kimberley, South Africa
Discoverer
Unknown
John W. Judd
Etymology
From Greek pikros bitter + -ite, 19th century
From Kimberley + -ite, from the name of the South African town of Kimberley where the rock was first found.
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock