Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
History
Origin
Italy
Iceland
Discoverer
Unknown
Ian S. E. Carmichael
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Volcanic
Other Categories
Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock