Definition
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
Basanite is a black basaltic rock which mainly contains plagioclase, augite, olivine and nepheline and is formerly used as a touchstone
History
Origin
Pike County, U.S
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Discoverer
Unknown
Unknown
Etymology
From French, from peridot + -ite
From Latin basanites + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
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Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock