Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Italy
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
Class
Igneous Rocks
Sedimentary 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, Opaque Rock