Definition
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Tamil Nadu, India
Italy
Discoverer
T. H. Holland
Marcus Vitruvius Pollio
Etymology
From Job Charnock, an administtrator of East India Company
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
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock