Definition
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Germany
Italy
Discoverer
Christian Leopold von Buch
Marcus Vitruvius Pollio
Etymology
From Greek di + base
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
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock