Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone
History
Origin
Hawaii Islands
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Discoverer
Unknown
Alexander von Humboldt
Etymology
From Greek pikros bitter + -ite, 19th century
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock