Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
History
Origin
Italy
USA
Discoverer
Unknown
Edgar Bailey
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
From French schiste, Greek skhistos i.e. split
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
-
Other Categories
Medium Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock