Definition
Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
History
Origin
France
Italy
Discoverer
Unknown
Unknown
Etymology
From Latin varius, speckled, variegated
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
Volcanic
Volcanic
Other Categories
Opaque Rock
Medium Grained Rock, Opaque Rock