Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
History
Origin
Italy
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
-
Other Categories
Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock