Definition
Diorite is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar,biotite, hornblende, and pyroxene
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
-
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
From early 19th century coined in French, formed irregularly from Greek diorizein distinguish
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
Plutonic
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Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock