Definition
Marble is a non-foliated metamorphic rock which is composed of recrystallized carbonate which is formed when limestone is exposed to high temperatures and pressures over a long time
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
History
Origin
Egypt
Hawaii Islands
Discoverer
Unknown
Unknown
Etymology
From the Greek marmaros, shining stone and also from the English word marmoreal meaning marble-like
From Greek pikros bitter + -ite, 19th century
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock