Definition
Origin
Discoverer
Etymology
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Other Categories
Harzburgite is a plutonic rock of the peridotite group consisting largely of orthopyroxene and olivine
From the name of a town in Harzburg, Germany
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
Christian Leopold von Buch
Fine Grained Rock, Medium Grained Rock, Opaque Rock