Definition
Harzburgite is a plutonic rock of the peridotite group consisting largely of orthopyroxene and olivine
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
History
Origin
Germany
Italy
Discoverer
Unknown
Unknown
Etymology
From the name of a town in Harzburg, Germany
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Medium Grained Rock, Opaque Rock