Definition
Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
History
Origin
Central Europe
Hawaii Islands
Discoverer
Unknown
Unknown
Etymology
From Latin granulum, a little grain or fine grained
From Greek pikros bitter + -ite, 19th century
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock