Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
History
Origin
Germany
Italy
Discoverer
Christian Leopold von Buch
Unknown
Etymology
From Latin glaber bare, smooth, bald
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, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Medium Grained Rock, Opaque Rock